-
Added
stat_align()
to align data without common x-coordinates prior to stacking. This is now the default stat forgeom_area()
(@thomasp85, #4850) -
Fix a bug in
stat_contour_filled()
where break value differences below a certain number of digits would cause the computations to fail (@thomasp85, #4874) -
stage()
now properly refers to the values without scale transformations for the stage ofafter_stat
. If your code requires the scaled version of the values for some reason, you have to apply the same transformation by yourself, e.g.sqrt()
forscale_{x,y}_sqrt()
(@yutannihilation and @teunbrand, #4155). -
A
linewidth
aesthetic has been introduced and supersedes thesize
aesthetic for scaling the width of lines in line based geoms.size
will remain functioning but deprecated for these geoms and it is recommended to update all code to reflect the new aesthetic (@thomasp85, #3672) -
Secondary axis ticks are now positioned more precisely, removing small visual artefacts with alignment between grid and ticks (@thomasp85, #3576)
-
Improve
stat_function
documentation regardingxlim
argument. (@92amartins, #4474) -
qplot()
is now formally deprecated (@yutannihilation, #3956). -
Use
rlang::hash()
instead ofdigest::digest()
. This update may lead to changes in the automatic sorting of legends. In order to enforce a specific legend order use theorder
argument in the guide. (@thomasp85, #4458) -
Fix various issues with how
labels
,breaks
,limits
, andshow.limits
interact in the different binning guides (@thomasp85, #4831) -
Automatic break calculation now squishes the scale limits to the domain of the transformation. This allows
scale_{x/y}_sqrt()
to find breaks at 0
when appropriate (@teunbrand, #980). -
Using multiple modified aesthetics correctly will no longer trigger warnings. If used incorrectly, the warning will now report the duplicated aesthetic instead of
NA
(@teunbrand, #4707). -
...
supportsrlang::list2
dynamic dots in all public functions. (@mone27, #4764) -
theme()
now has astrip.clip
argument, that can be set to"off"
to prevent the clipping of strip text and background borders (@teunbrand, #4118) -
aes()
now supports the!!!
operator in its first two arguments (#2675). Thanks to @yutannihilation and @teunbrand for draft implementations. -
Require rlang >= 1.0.0 (@billybarc, #4797)
-
geom_violin()
no longer issues "collapsing to unique 'x' values" warning (@bersbersbers, #4455) -
annotate()
now documents unsupported geoms (geom_abline()
,geom_hline()
andgeom_vline()
), and warns when they are requested (@mikmart, #4719) -
presidential
dataset now includes Trump's presidency (@bkmgit, #4703). -
referring to
x
in backquoted expressions withlabel_bquote()
is no longer possible. -
position_stack()
now works fully withgeom_text()
(@thomasp85, #4367) -
geom_tile()
now correctly recognises missing data inxmin
,xmax
,ymin
, andymax
(@thomasp85 and @sigmapi, #4495) -
geom_hex()
will now use the binwidth fromstat_bin_hex()
if present, instead of deriving it (@thomasp85, #4580) -
geom_hex()
now works on non-linear coordinate systems (@thomasp85) -
Fixed a bug throwing errors when trying to render an empty plot with secondary axes (@thomasp85, #4509)
-
Axes are now added correctly in
facet_wrap()
whenas.table = FALSE
(@thomasp85, #4553) -
Better compatibility of custom device functions in
ggsave()
(@thomasp85, #4539) -
Binning scales are now more resilient to calculated limits that ends up being
NaN
after transformations (@thomasp85, #4510) -
Strip padding in
facet_grid()
is now only in effect ifstrip.placement = "outside"
and an axis is present between the strip and the panel (@thomasp85, #4610) -
Aesthetics of length 1 are now recycled to 0 if the length of the data is 0 (@thomasp85, #4588)
-
Setting
size = NA
will no longer causeguide_legend()
to error (@thomasp85, #4559) -
Setting
stroke
toNA
ingeom_point()
will no longer impair the sizing of the points (@thomasp85, #4624) -
stat_bin_2d()
now correctly recognises theweight
aesthetic (@thomasp85, #4646) -
All geoms now have consistent exposure of linejoin and lineend parameters, and the guide keys will now respect these settings (@thomasp85, #4653)
-
geom_sf()
now respectsarrow
parameter for lines (@jakeruss, #4659) -
Updated documentation for
print.ggplot
to reflect that it returns the original plot, not the result ofggplot_build()
. (@r2evans, #4390) -
scale_*_manual()
no longer displays extra legend keys, or changes their order, when a namedvalues
argument has more items than the data. To display allvalues
on the legend instead, usescale_*_manual(values = vals, limits = names(vals))
. (@teunbrand, @banfai, #4511, #4534) -
geom_contour()
now accepts a function in thebreaks
argument (@eliocamp, #4652). -
VISUAL CHANGE:
scale_*_viridis_b()
now uses the full range of the viridis scales (@gregleleu, #4737) -
Updated documentation for
geom_contour()
to correctly reflect argument precedence betweenbins
andbinwidth
. (@eliocamp, #4651) -
The
ticks.linewidth
andframe.linewidth
parameters ofguide_colourbar()
are now multiplied with.pt
like elsewhere in ggplot2. It can cause visual changes when these arguments are not the defaults and these changes can be restored to their previous behaviour by adding/ .pt
(@teunbrand #4314). -
Dots in
geom_dotplot()
are now correctly aligned to the baseline whenstackratio != 1
andstackdir != "up"
(@mjskay, #4614) -
Key glyphs for
geom_boxplot()
,geom_crossbar()
,geom_pointrange()
, andgeom_linerange()
are now orientation-aware (@mjskay, #4732) -
Updated documentation for
geom_smooth()
to more clearly describe effects of thefullrange
parameter (@thoolihan, #4399).
This is a very small release only applying an internal change to comply with
R 4.2 and its deprecation of default.stringsAsFactors()
. There are no user
facing changes and no breaking changes.
This is a very small release focusing on fixing a couple of untenable issues that surfaced with the 3.3.4 release
- Revert changes made in #4434 (apply transform to intercept in
geom_abline()
) as it introduced undesirable issues far worse than the bug it fixed (@thomasp85, #4514) - Fixes an issue in
ggsave()
when producing emf/wmf files (@yutannihilation, #4521) - Warn when grDevices specific arguments are passed to ragg devices (@thomasp85, #4524)
- Fix an issue where
coord_sf()
was reporting that it is non-linear even when data is provided in projected coordinates (@clauswilke, #4527)
This is a larger patch release fixing a huge number of bugs and introduces a small selection of feature refinements.
-
Alt-text can now be added to a plot using the
alt
label, i.e+ labs(alt = ...)
. Currently this alt text is not automatically propagated, but we plan to integrate into Shiny, RMarkdown, and other tools in the future. (@thomasp85, #4477) -
Add support for the BrailleR package for creating descriptions of the plot when rendered (@thomasp85, #4459)
-
coord_sf()
now has an argumentdefault_crs
that specifies the coordinate reference system (CRS) for non-sf layers and scale/coord limits. This argument defaults toNULL
, which means non-sf layers are assumed to be in projected coordinates, as in prior ggplot2 versions. Settingdefault_crs = sf::st_crs(4326)
provides a simple way to interpret x and y positions as longitude and latitude, regardless of the CRS used bycoord_sf()
. Authors of extension packages implementingstat_sf()
-like functionality are encouraged to look at the source code ofstat_sf()
'scompute_group()
function to see how to provide scale-limit hints tocoord_sf()
(@clauswilke, #3659). -
ggsave()
now uses ragg to render raster output if ragg is available. It also handles custom devices that sets a default unit (e.g.ragg::agg_png
) correctly (@thomasp85, #4388) -
ggsave()
now returns the saved file location invisibly (#3379, @eliocamp). Note that, as a side effect, an unofficial hack<ggplot object> + ggsave()
no longer works (#4513). -
The scale arguments
limits
,breaks
,minor_breaks
,labels
,rescaler
andoob
now accept purrr style lambda notation (@teunbrand, #4427). The same is true foras_labeller()
(and therefore alsolabeller()
) (@netique, #4188). -
Manual scales now allow named vectors passed to
values
to contain fewer elements than existing in the data. Elements not present in values will be set toNA
(@thomasp85, #3451) -
Date and datetime position scales support out-of-bounds (oob) arguments to control how limits affect data outside those limits (@teunbrand, #4199).
-
Fix a bug that
after_stat()
andafter_scale()
cannot refer to aesthetics if it's specified in the plot-global mapping (@yutannihilation, #4260). -
Fix bug in
annotate_logticks()
that would cause an error when used together withcoord_flip()
(@thomasp85, #3954) -
Fix a bug in
geom_abline()
that resulted inintercept
not being subjected to the transformation of the y scale (@thomasp85, #3741) -
Extent the range of the line created by
geom_abline()
so that line ending is not visible for large linewidths (@thomasp85, #4024) -
Fix bug in
geom_dotplot()
where dots would be positioned wrong withstackgroups = TRUE
(@thomasp85, #1745) -
Fix calculation of confidence interval for locfit smoothing in
geom_smooth()
(@topepo, #3806) -
Fix bug in
geom_text()
where"outward"
and"inward"
justification for someangle
values was reversed (@aphalo, #4169, #4447) -
ggsave()
now sets the default background to match the fill value of theplot.background
theme element (@karawoo, #4057) -
It is now deprecated to specify
guides(<scale> = FALSE)
orscale_*(guide = FALSE)
to remove a guide. Please useguides(<scale> = "none")
orscale_*(guide = "none")
instead (@yutannihilation, #4097) -
Fix a bug in
guide_bins()
where keys would disappear if the guide was reversed (@thomasp85, #4210) -
Fix bug in
guide_coloursteps()
that would repeat the terminal bins if the breaks coincided with the limits of the scale (@thomasp85, #4019) -
Make sure that default labels from default mappings doesn't overwrite default labels from explicit mappings (@thomasp85, #2406)
-
Fix bug in
labeller()
where parsing was turned off if.multiline = FALSE
(@thomasp85, #4084) -
Make sure
label_bquote()
has access to the calling environment when evaluating the labels (@thomasp85, #4141) -
Fix a bug in the layer implementation that introduced a new state after the first render which could lead to a different look when rendered the second time (@thomasp85, #4204)
-
Fix a bug in legend justification where justification was lost of the legend dimensions exceeded the available size (@thomasp85, #3635)
-
Fix a bug in
position_dodge2()
whereNA
values in thee data would cause an error (@thomasp85, #2905) -
Make sure
position_jitter()
creates the same jittering independent of whether it is called by name or with constructor (@thomasp85, #2507) -
Fix a bug in
position_jitter()
where different jitters would be applied to different position aesthetics of the same axis (@thomasp85, #2941) -
Fix a bug in
qplot()
when supplyingc(NA, NA)
as axis limits (@thomasp85, #4027) -
Remove cross-inheritance of default discrete colour/fill scales and check the type and aesthetic of function output if
type
is a function (@thomasp85, #4149) -
Fix bug in
scale_[x|y]_date()
where custom breaks functions that resulted in fracional dates would get misaligned (@thomasp85, #3965) -
Fix bug in
scale_[x|y]_datetime()
where a specified timezone would be ignored by the scale (@thomasp85, #4007) -
Fix issue in
sec_axis()
that would throw warnings in the absence of any secondary breaks (@thomasp85, #4368) -
stat_bin()
's computed variablewidth
is now documented (#3522). -
stat_count()
now computes width based on the full dataset instead of per group (@thomasp85, #2047) -
Extended
stat_ecdf()
to calculate the cdf from either x or y instead from y only (@jgjl, #4005) -
Fix a bug in
stat_summary_bin()
where one more than the requested number of bins would be created (@thomasp85, #3824) -
Only drop groups in
stat_ydensity()
when there are fewer than two data points and throw a warning (@andrewwbutler, #4111). -
Fixed a bug in strip assembly when theme has
strip.text = element_blank()
and plots are faceted with multi-layered strips (@teunbrand, #4384). -
Using
theme(aspect.ratio = ...)
together with free space infacet_grid()
now crrectly throws an error (@thomasp85, #3834) -
Fixed a bug in
labeller()
so that.default
is passed toas_labeller()
when labellers are specified by naming faceting variables. (@waltersom, #4031) -
Updated style for example code (@rjake, #4092)
-
ggplot2 now requires R >= 3.3 (#4247).
-
ggplot2 now uses
rlang::check_installed()
to check if a suggested package is installed, which will offer to install the package before continuing (#4375, @malcolmbarrett) -
Improved error with hint when piping a
ggplot
object into a facet function (#4379, @mitchelloharawild).
This is a small patch release mainly intended to address changes in R and CRAN. It further changes the licensing model of ggplot2 to an MIT license.
-
Update the ggplot2 licence to an MIT license (#4231, #4232, #4233, and #4281)
-
Use vdiffr conditionally so ggplot2 can be tested on systems without vdiffr
-
Update tests to work with the new
all.equal()
defaults in R >4.0.3 -
Fixed a bug that
guide_bins()
mistakenly ignoreoverride.aes
argument (@yutannihilation, #4085).
This is a small release focusing on fixing regressions introduced in 3.3.1.
-
Added an
outside
option toannotation_logticks()
that places tick marks outside of the plot bounds. (#3783, @kbodwin) -
annotation_raster()
adds support for native rasters. For large rasters, native rasters render significantly faster than arrays (@kent37, #3388) -
Facet strips now have dedicated position-dependent theme elements (
strip.text.x.top
,strip.text.x.bottom
,strip.text.y.left
,strip.text.y.right
) that inherit fromstrip.text.x
andstrip.text.y
, respectively. As a consequence, some theme stylings now need to be applied to the position-dependent elements rather than to the parent elements. This change was already introduced in ggplot2 3.3.0 but not listed in the changelog. (@thomasp85, #3683) -
Facets now handle layers containing no data (@yutannihilation, #3853).
-
A newly added geom
geom_density_2d_filled()
and associated statstat_density_2d_filled()
can draw filled density contours (@clauswilke, #3846). -
A newly added
geom_function()
is now recommended to use in conjunction with/instead ofstat_function()
. In addition,stat_function()
now works with transformed y axes, e.g.scale_y_log10()
, and in plots containing no other data or layers (@clauswilke, #3611, #3905, #3983). -
Fixed a bug in
geom_sf()
that caused problems with legend-type autodetection (@clauswilke, #3963). -
Support graphics devices that use the
file
argument instead offileneame
inggsave()
(@bwiernik, #3810) -
Default discrete color scales are now configurable through the
options()
ofggplot2.discrete.colour
andggplot2.discrete.fill
. When set to a character vector of colour codes (or list of character vectors) with sufficient length, these colours are used for the default scale. Seehelp(scale_colour_discrete)
for more details and examples (@cpsievert, #3833). -
Default continuous colour scales (i.e., the
options()
ggplot2.continuous.colour
andggplot2.continuous.fill
, which inform thetype
argument ofscale_fill_continuous()
andscale_colour_continuous()
) now accept a function, which allows more control over these defaultcontinuous_scale()
s (@cpsievert, #3827). -
A bug was fixed in
stat_contour()
when calculating breaks based on thebins
argument (@clauswilke, #3879, #4004). -
Data columns can now contain
Vector
S4 objects, which are widely used in the Bioconductor project. (@teunbrand, #3837)
This is a small release with no code change. It removes all malicious links to a site that got hijacked from the readme and pkgdown site.
This is a minor release but does contain a range of substantial new features, along with the standard bug fixes. The release contains a few visual breaking changes, along with breaking changes for extension developers due to a shift in internal representation of the position scales and their axes. No user breaking changes are included.
This release also adds Dewey Dunnington (@paleolimbot) to the core team.
There are no user-facing breaking changes, but a change in some internal representations that extension developers may have relied on, along with a few breaking visual changes which may cause visual tests in downstream packages to fail.
-
The
panel_params
field in theLayout
now contains a list of list ofViewScale
objects, describing the trained coordinate system scales, instead of the list object used before. Any extensions that use this field will likely break, as will unit tests that checks aspects of this. -
element_text()
now issues a warning when vectorized arguments are provided, as incolour = c("red", "green", "blue")
. Such use is discouraged and not officially supported (@clauswilke, #3492). -
Changed
theme_grey()
setting for legend key so that it creates no border (NA
) rather than drawing a white one. (@annennenne, #3180) -
geom_ribbon()
now draws separate lines for the upper and lower intervals ifcolour
is mapped. Similarly,geom_area()
andgeom_density()
now draw the upper lines only in the same case by default. If you want old-style full stroking, useoutline.type = "full"
(@yutannihilation, #3503 / @thomasp85, #3708).
-
The evaluation time of aesthetics can now be controlled to a finer degree.
after_stat()
supersedes the use ofstat()
and..var..
-notation, and is joined byafter_scale()
to allow for mapping to scaled aesthetic values. Remapping of the same aesthetic is now supported withstage()
, so you can map a data variable to a stat aesthetic, and remap the same aesthetic to something else after statistical transformation (@thomasp85, #3534) -
All
coord_*()
functions withxlim
andylim
arguments now accept vectors withNA
as a placeholder for the minimum or maximum value (e.g.,ylim = c(0, NA)
would zoom the y-axis from 0 to the maximum value observed in the data). This mimics the behaviour of thelimits
argument in continuous scale functions (@paleolimbot, #2907). -
Allowed reversing of discrete scales by re-writing
get_limits()
(@AnneLyng, #3115) -
All geoms and stats that had a direction (i.e. where the x and y axes had different interpretation), can now freely choose their direction, instead of relying on
coord_flip()
. The direction is deduced from the aesthetic mapping, but can also be specified directly with the neworientation
argument (@thomasp85, #3506). -
Position guides can now be customized using the new
guide_axis()
, which can be passed to positionscale_*()
functions or viaguides()
. The new axis guide (guide_axis()
) comes with argumentscheck.overlap
(automatic removal of overlapping labels),angle
(easy rotation of axis labels), andn.dodge
(dodge labels into multiple rows/columns) (@paleolimbot, #3322). -
A new scale type has been added, that allows binning of aesthetics at the scale level. It has versions for both position and non-position aesthetics and comes with two new guides (
guide_bins
andguide_coloursteps
) (@thomasp85, #3096) -
scale_x_continuous()
andscale_y_continuous()
gains ann.breaks
argument guiding the number of automatic generated breaks (@thomasp85, #3102) -
Added
stat_contour_filled()
andgeom_contour_filled()
, which compute and draw filled contours of gridded data (@paleolimbot, #3044).geom_contour()
andstat_contour()
now use the isoband package to compute contour lines. Thecomplete
parameter (which was undocumented and has been unused for at least four years) was removed (@paleolimbot, #3044). -
Themes have gained two new parameters,
plot.title.position
andplot.caption.position
, that can be used to customize how plot title/subtitle and plot caption are positioned relative to the overall plot (@clauswilke, #3252).
-
Geom
now gains asetup_params()
method in line with the other ggproto classes (@thomasp85, #3509) -
The newly added function
register_theme_elements()
now allows developers of extension packages to define their own new theme elements and place them into the ggplot2 element tree (@clauswilke, #2540).
-
coord_trans()
now draws second axes and acceptsxlim
,ylim
, andexpand
arguments to bring it up to feature parity withcoord_cartesian()
. Thextrans
andytrans
arguments that were deprecated in version 1.0.1 in favour ofx
andy
were removed (@paleolimbot, #2990). -
coord_trans()
now calculates breaks using the expanded range (previously these were calculated using the unexpanded range, which resulted in differences between plots made withcoord_trans()
and those made withcoord_cartesian()
). The expansion for discrete axes incoord_trans()
was also updated such that it behaves identically to that incoord_cartesian()
(@paleolimbot, #3338). -
expand_scale()
was deprecated in favour ofexpansion()
for setting theexpand
argument ofx
andy
scales (@paleolimbot). -
geom_abline()
,geom_hline()
, andgeom_vline()
now issue more informative warnings when supplied with set aesthetics (i.e.,slope
,intercept
,yintercept
, and/orxintercept
) and mapped aesthetics (i.e.,data
and/ormapping
). -
Fix a bug in
geom_raster()
that squeezed the image when it went outside scale limits (#3539, @thomasp85) -
geom_sf()
now determines the legend type automatically (@microly, #3646). -
geom_sf()
now removes rows that can't be plotted due toNA
aesthetics (#3546, @thomasp85) -
geom_sf()
now applies alpha to linestring geometries (#3589, @yutannihilation). -
gg_dep()
was deprecated (@perezp44, #3382). -
Added function
ggplot_add.by()
for lists created withby()
, allowing such lists to be added to ggplot objects (#2734, @Maschette) -
ggplot2 no longer depends on reshape2, which means that it no longer (recursively) needs plyr, stringr, or stringi packages.
-
Increase the default
nbin
ofguide_colourbar()
to place the ticks more precisely (#3508, @yutannihilation). -
manual_scale()
now matchesvalues
with the order ofbreaks
whenevervalues
is an unnamed vector. Previously, unnamedvalues
would match with the limits of the scale and ignore the order of anybreaks
provided. Note that this may change the appearance of plots that previously relied on the unordered behaviour (#2429, @idno0001). -
scale_manual_*(limits = ...)
now actually limits the scale (#3262, @yutannihilation). -
Fix a bug when
show.legend
is a named logical vector (#3461, @yutannihilation). -
Added weight aesthetic option to
stat_density()
and made scaling of weights the default (@annennenne, #2902) -
stat_density2d()
can now take anadjust
parameter to scale the default bandwidth. (#2860, @haleyjeppson) -
stat_smooth()
usesREML
by default, ifmethod = "gam"
andgam
's method is not specified (@ikosmidis, #2630). -
stacking text when calculating the labels and the y axis with
stat_summary()
now works (@ikosmidis, #2709) -
stat_summary()
and related functions now support rlang-style lambda functions (#3568, @dkahle). -
The data mask pronoun,
.data
, is now stripped from default labels. -
Addition of partial themes to plots has been made more predictable; stepwise addition of individual partial themes is now equivalent to addition of multple theme elements at once (@clauswilke, #3039).
-
Facets now don't fail even when some variable in the spec are not available in all layers (@yutannihilation, #2963).
This is a patch release fixing a few regressions introduced in 3.2.0 as well as fixing some unit tests that broke due to upstream changes.
position_stack()
no longer changes the order of the input data. Changes to the internal behaviour ofgeom_ribbon()
made this reordering problematic with ribbons that spannedy = 0
(#3471)- Using
qplot()
with a single positional aesthetic will no longer title the non-specified scale as"NULL"
(#3473) - Fixes unit tests for sf graticule labels caused by chages to sf
This is a minor release with an emphasis on internal changes to make ggplot2 faster and more consistent. The few interface changes will only affect the aesthetics of the plot in minor ways, and will only potentially break code of extension developers if they have relied on internals that have been changed. This release also sees the addition of Hiroaki Yutani (@yutannihilation) to the core developer team.
With the release of R 3.6, ggplot2 now requires the R version to be at least 3.2, as the tidyverse is committed to support 5 major versions of R.
-
Two patches (#2996 and #3050) fixed minor rendering problems. In most cases, the visual changes are so subtle that they are difficult to see with the naked eye. However, these changes are detected by the vdiffr package, and therefore any package developers who use vdiffr to test for visual correctness of ggplot2 plots will have to regenerate all reference images.
-
In some cases, ggplot2 now produces a warning or an error for code that previously produced plot output. In all these cases, the previous plot output was accidental, and the plotting code uses the ggplot2 API in a way that would lead to undefined behavior. Examples include a missing
group
aesthetic ingeom_boxplot()
(#3316), annotations across multiple facets (#3305), and not using aesthetic mappings when drawing ribbons withgeom_ribbon()
(#3318).
-
This release includes a range of internal changes that speeds up plot generation. None of the changes are user facing and will not break any code, but in general ggplot2 should feel much faster. The changes includes, but are not limited to:
-
Caching ascent and descent dimensions of text to avoid recalculating it for every title.
-
Using a faster data.frame constructor as well as faster indexing into data.frames
-
Removing the plyr dependency, replacing plyr functions with faster equivalents.
-
-
geom_polygon()
can now draw polygons with holes using the newsubgroup
aesthetic. This functionality requires R 3.6.0 (@thomasp85, #3128) -
Aesthetic mappings now accept functions that return
NULL
(@yutannihilation, #2997). -
stat_function()
now accepts rlang/purrr style anonymous functions for thefun
parameter (@dkahle, #3159). -
geom_rug()
gains an "outside" option to allow for moving the rug tassels to outside the plot area (@njtierney, #3085) and alength
option to allow for changing the length of the rug lines (@daniel-wells, #3109). -
All geoms now take a
key_glyph
paramter that allows users to customize how legend keys are drawn (@clauswilke, #3145). In addition, a new key glyphtimeseries
is provided to draw nice legends for time series (@mitchelloharawild, #3145).
-
Layers now have a new member function
setup_layer()
which is called at the very beginning of the plot building process and which has access to the original input data and the plot object being built. This function allows the creation of custom layers that autogenerate aesthetic mappings based on the input data or that filter the input data in some form. For the time being, this feature is not exported, but it has enabled the development of a new layer type,layer_sf()
(see next item). Other special-purpose layer types may be added in the future (@clauswilke, #2872). -
A new layer type
layer_sf()
can auto-detect and auto-map sf geometry columns in the data. It should be used by extension developers who are writing new sf-based geoms or stats (@clauswilke, #3232). -
x0
andy0
are now recognized positional aesthetics so they will get scaled if used in extension geoms and stats (@thomasp85, #3168) -
Continuous scale limits now accept functions which accept the default limits and return adjusted limits. This makes it possible to write a function that e.g. ensures the limits are always a multiple of 100, regardless of the data (@econandrew, #2307).
-
cut_width()
now accepts...
to pass further arguments tobase::cut.default()
likecut_number()
andcut_interval()
already did (@cderv, #3055) -
coord_map()
now can have axes on the top and right (@karawoo, #3042). -
coord_polar()
now correctly rescales the secondary axis (@linzi-sg, #3278) -
coord_sf()
,coord_map()
, andcoord_polar()
now squash-Inf
andInf
into the min and max of the plot (@yutannihilation, #2972). -
coord_sf()
graticule lines are now drawn in the same thickness as panel grid lines incoord_cartesian()
, and seting panel grid lines toelement_blank()
now also works incoord_sf()
(@clauswilke, #2991, #2525). -
economics
data has been regenerated. This leads to some changes in the values of all columns (especially inpsavert
), but more importantly, strips the grouping attributes fromeconomics_long
. -
element_line()
now fills closed arrows (@yutannihilation, #2924). -
Facet strips on the left side of plots now have clipping turned on, preventing text from running out of the strip and borders from looking thicker than for other strips (@karawoo, #2772 and #3061).
-
ggplot2 now works in Turkish locale (@yutannihilation, #3011).
-
Clearer error messages for inappropriate aesthetics (@clairemcwhite, #3060).
-
ggplot2 no longer attaches any external packages when using functions that depend on packages that are suggested but not imported by ggplot2. The affected functions include
geom_hex()
,stat_binhex()
,stat_summary_hex()
,geom_quantile()
,stat_quantile()
, andmap_data()
(@clauswilke, #3126). -
geom_area()
andgeom_ribbon()
now sort the data along the x-axis in thesetup_data()
method rather than as part ofdraw_group()
(@thomasp85, #3023) -
geom_hline()
,geom_vline()
, andgeom_abline()
now throw a warning if the user supplies both anxintercept
,yintercept
, orslope
value and a mapping (@RichardJActon, #2950). -
geom_rug()
now works withcoord_flip()
(@has2k1, #2987). -
geom_violin()
no longer throws an error when quantile lines fall outside the violin polygon (@thomasp85, #3254). -
guide_legend()
andguide_colorbar()
now use appropriate spacing between legend key glyphs and legend text even if the legend title is missing (@clauswilke, #2943). -
Default labels are now generated more consistently; e.g., symbols no longer get backticks, and long expressions are abbreviated with
...
(@yutannihilation, #2981). -
All-
Inf
layers are now ignored for picking the scale (@yutannihilation, #3184). -
Diverging Brewer colour palette now use the correct mid-point colour (@dariyasydykova, #3072).
-
scale_color_continuous()
now points toscale_colour_continuous()
so that it will handletype = "viridis"
as the documentation states (@hlendway, #3079). -
scale_shape_identity()
now works correctly withguide = "legend"
(@malcolmbarrett, #3029) -
scale_continuous
will now draw axis line even if the length of breaks is 0 (@thomasp85, #3257) -
stat_bin()
will now error when the number of bins exceeds 1e6 to avoid accidentally freezing the user session (@thomasp85). -
sec_axis()
now places ticks accurately when using nonlinear transformations (@dpseidel, #2978). -
facet_wrap()
andfacet_grid()
now automatically remove NULL from facet specs, and accept empty specs (@yutannihilation, #3070, #2986). -
stat_bin()
now handles data with only one unique value (@yutannihilation #3047). -
sec_axis()
now accepts functions as well as formulas (@yutannihilation, #3031). -
New theme elements allowing different ticks lengths for each axis. For instance, this can be used to have inwards ticks on the x-axis (
axis.ticks.length.x
) and outwards ticks on the y-axis (axis.ticks.length.y
) (@pank, #2935). -
The arguments of
Stat*$compute_layer()
andPosition*$compute_layer()
are now renamed to always match the ones ofStat$compute_layer()
andPosition$compute_layer()
(@yutannihilation, #3202). -
geom_*()
andstat_*()
now accepts purrr-style lambda notation (@yutannihilation, #3138). -
geom_tile()
andgeom_rect()
now draw rectangles without notches at the corners. The style of the corner can be controlled bylinejoin
parameters (@yutannihilation, #3050).
This is a minor release and breaking changes have been kept to a minimum. End users of ggplot2 are unlikely to encounter any issues. However, there are a few items that developers of ggplot2 extensions should be aware of. For additional details, see also the discussion accompanying issue #2890.
-
In non-user-facing internal code (specifically in the
aes()
function and in theaesthetics
argument of scale functions), ggplot2 now always uses the British spelling for aesthetics containing the word "colour". When users specify a "color" aesthetic it is automatically renamed to "colour". This renaming is also applied to non-standard aesthetics that contain the word "color". For example, "point_color" is renamed to "point_colour". This convention makes it easier to support both British and American spelling for novel, non-standard aesthetics, but it may require some adjustment for packages that have previously introduced non-standard color aesthetics using American spelling. A new functionstandardise_aes_names()
is provided in case extension writers need to perform this renaming in their own code (@clauswilke, #2649). -
Functions that generate other functions (closures) now force the arguments that are used from the generated functions, to avoid hard-to-catch errors. This may affect some users of manual scales (such as
scale_colour_manual()
,scale_fill_manual()
, etc.) who depend on incorrect behavior (@krlmlr, #2807). -
Coord
objects now have a functionbacktransform_range()
that returns the panel range in data coordinates. This change may affect developers of custom coords, who now should implement this function. It may also affect developers of custom geoms that use therange()
function. In some applications,backtransform_range()
may be more appropriate (@clauswilke, #2821).
-
coord_sf()
has much improved customization of axis tick labels. Labels can now be set manually, and there are two new parameters,label_graticule
andlabel_axes
, that can be used to specify which graticules to label on which side of the plot (@clauswilke, #2846, #2857, #2881). -
Two new geoms
geom_sf_label()
andgeom_sf_text()
can draw labels and text on sf objects. Under the hood, a newstat_sf_coordinates()
calculates the x and y coordinates from the coordinates of the sf geometries. You can customize the calculation method viafun.geometry
argument (@yutannihilation, #2761).
-
benchplot()
now uses tidy evaluation (@dpseidel, #2699). -
The error message in
compute_aesthetics()
now only provides the names of aesthetics with mismatched lengths, rather than all aesthetics (@karawoo, #2853). -
For faceted plots, data is no longer internally reordered. This makes it safer to feed data columns into
aes()
or into parameters of geoms or stats. However, doing so remains discouraged (@clauswilke, #2694). -
coord_sf()
now also understands theclip
argument, just like the other coords (@clauswilke, #2938). -
fortify()
now displays a more informative error message forgrouped_df()
objects when dplyr is not installed (@jimhester, #2822). -
All
geom_*()
now display an informative error message when required aesthetics are missing (@dpseidel, #2637 and #2706). -
geom_boxplot()
now understands thewidth
parameter even when used with a non-standard stat, such asstat_identity()
(@clauswilke, #2893). -
geom_hex()
now understands thesize
andlinetype
aesthetics (@mikmart, #2488). -
geom_hline()
,geom_vline()
, andgeom_abline()
now work properly withcoord_trans()
(@clauswilke, #2149, #2812). -
geom_text(..., parse = TRUE)
now correctly renders the expected number of items instead of silently dropping items that are empty expressions, e.g. the empty string "". If an expression spans multiple lines, we take just the first line and drop the rest. This same issue is also fixed forgeom_label()
and the axis labels forgeom_sf()
(@slowkow, #2867). -
geom_sf()
now respectslineend
,linejoin
, andlinemitre
parameters for lines and polygons (@alistaire47, #2826). -
ggsave()
now exits without creating a new graphics device if previously none was open (@clauswilke, #2363). -
labs()
now has named argumentstitle
,subtitle
,caption
, andtag
. Also,labs()
now accepts tidyeval (@yutannihilation, #2669). -
position_nudge()
is now more robust and nudges only in the direction requested. This enables, for example, the horizontal nudging of boxplots (@clauswilke, #2733). -
sec_axis()
anddup_axis()
now return appropriate breaks for the secondary axis when applied to log transformed scales (@dpseidel, #2729). -
sec_axis()
now works as expected when used in combination with tidy eval (@dpseidel, #2788). -
scale_*_date()
,scale_*_time()
andscale_*_datetime()
can now display a secondary axis that is a one-to-one transformation of the primary axis, implemented using thesec.axis
argument to the scale constructor (@dpseidel, #2244). -
stat_contour()
,stat_density2d()
,stat_bin2d()
,stat_binhex()
now calculate normalized statistics includingnlevel
,ndensity
, andncount
. Also,stat_density()
now includes the calculated statisticnlevel
, an alias forscaled
, to better match the syntax ofstat_bin()
(@bjreisman, #2679).
-
ggplot2 now supports/uses tidy evaluation (as described below). This is a major change and breaks a number of packages; we made this breaking change because it is important to make ggplot2 more programmable, and to be more consistent with the rest of the tidyverse. The best general (and detailed) introduction to tidy evaluation can be found in the meta programming chapters in Advanced R.
The primary developer facing change is that
aes()
now contains quosures (expression + environment pairs) rather than symbols, and you'll need to take a different approach to extracting the information you need. A common symptom of this change are errors "undefined columns selected" or "invalid 'type' (list) of argument" (#2610). As in the previous version, constants (likeaes(x = 1)
oraes(colour = "smoothed")
) are stored as is.In this version of ggplot2, if you need to describe a mapping in a string, use
quo_name()
(to generate single-line strings; longer expressions may be abbreviated) orquo_text()
(to generate non-abbreviated strings that may span multiple lines). If you do need to extract the value of a variable instead userlang::eval_tidy()
. You may want to condition on(packageVersion("ggplot2") <= "2.2.1")
so that your code can work with both released and development versions of ggplot2.We recognise that this is a big change and if you're not already familiar with rlang, there's a lot to learn. If you are stuck, or need any help, please reach out on https://community.rstudio.com.
-
Error: Column
y
must be a 1d atomic vector or a listInternally, ggplot2 now uses
as.data.frame(tibble::as_tibble(x))
to convert a list into a data frame. This improves ggplot2's support for list-columns (needed for sf support), at a small cost: you can no longer use matrix-columns. Note that unlike tibble we still allow column vectors such as returned bybase::scale()
because of their widespread use. -
Error: More than one expression parsed
Previously
aes_string(x = c("a", "b", "c"))
silently returnedaes(x = a)
. Now this is a clear error. -
Error:
data
must be uniquely named but has duplicate columnsIf layer data contains columns with identical names an error will be thrown. In earlier versions the first occuring column was chosen silently, potentially masking that the wrong data was chosen.
-
Error: Aesthetics must be either length 1 or the same as the data
Layers are stricter about the columns they will combine into a single data frame. Each aesthetic now must be either the same length as the data frame or a single value. This makes silent recycling errors much less likely.
-
Error:
coord_*
doesn't support free scalesFree scales only work with selected coordinate systems; previously you'd get an incorrect plot.
-
Error in f(...) : unused argument (range = c(0, 1))
This is because the
oob
argument to scale has been set to a function that only takes a single argument; it needs to take two arguments (x
, andrange
). -
Error: unused argument (output)
The function
guide_train()
now has an optional parameteraesthetic
that allows you to override theaesthetic
setting in the scale. To make your code work with the both released and development versions of ggplot2 appropriate, addaesthetic = NULL
to theguide_train()
method signature.# old guide_train.legend <- function(guide, scale) {...} # new guide_train.legend <- function(guide, scale, aesthetic = NULL) {...}
Then, inside the function, replace
scale$aesthetics[1]
,aesthetic %||% scale$aesthetics[1]
. (The %||% operator is defined in the rlang package).# old setNames(list(scale$map(breaks)), scale$aesthetics[1]) # new setNames(list(scale$map(breaks)), aesthetic %||% scale$aesthetics[1])
-
The long-deprecated
subset
argument tolayer()
has been removed.
-
aes()
now supports quasiquotation so that you can use!!
,!!!
, and:=
. This replacesaes_()
andaes_string()
which are now soft-deprecated (but will remain around for a long time). -
facet_wrap()
andfacet_grid()
now supportvars()
inputs. Likedplyr::vars()
, this helper quotes its inputs and supports quasiquotation. For instance, you can now supply faceting variables like this:facet_wrap(vars(am, cyl))
instead offacet_wrap(~am + cyl)
. Note that the formula interface is not going away and will not be deprecated.vars()
is simply meant to make it easier to create functions aroundfacet_wrap()
andfacet_grid()
.The first two arguments of
facet_grid()
becomerows
andcols
and now supportvars()
inputs. Note however that we took special care to ensure complete backward compatibility. With this changefacet_grid(vars(cyl), vars(am, vs))
is equivalent tofacet_grid(cyl ~ am + vs)
, andfacet_grid(cols = vars(am, vs))
is equivalent tofacet_grid(. ~ am + vs)
.One nice aspect of the new interface is that you can now easily supply names:
facet_grid(vars(Cylinder = cyl), labeller = label_both)
will give nice label titles to the facets. Of course, those names can be unquoted with the usual tidy eval syntax.
-
ggplot2 now has full support for sf with
geom_sf()
andcoord_sf()
:nc <- sf::st_read(system.file("shape/nc.shp", package = "sf"), quiet = TRUE) ggplot(nc) + geom_sf(aes(fill = AREA))
It supports all simple features, automatically aligns CRS across layers, sets up the correct aspect ratio, and draws a graticule.
-
ggplot2 now works on R 3.1 onwards, and uses the vdiffr package for visual testing.
-
In most cases, accidentally using
%>%
instead of+
will generate an informative error (#2400). -
New syntax for calculated aesthetics. Instead of using
aes(y = ..count..)
you can (and should!) useaes(y = stat(count))
.stat()
is a real function with documentation which hopefully will make this part of ggplot2 less confusing (#2059).stat()
is particularly nice for more complex calculations because you only need to specify it once:aes(y = stat(count / max(count)))
, rather thanaes(y = ..count.. / max(..count..))
-
New
tag
label for adding identification tags to plots, typically used for labelling a subplot with a letter. Add a tag withlabs(tag = "A")
, style it with theplot.tag
theme element, and control position with theplot.tag.position
theme setting (@thomasp85).
-
geom_segment()
andgeom_curve()
have a newarrow.fill
parameter which allows you to specify a separate fill colour for closed arrowheads (@hrbrmstr and @clauswilke, #2375). -
geom_point()
and friends can now take shapes as strings instead of integers, e.g.geom_point(shape = "diamond")
(@daniel-barnett, #2075). -
position_dodge()
gains apreserve
argument that allows you to control whether thetotal
width at eachx
value is preserved (the current default), or ensure that the width of asingle
element is preserved (what many people want) (#1935). -
New
position_dodge2()
provides enhanced dodging for boxplots. Compared toposition_dodge()
,position_dodge2()
comparesxmin
andxmax
values
to determine which elements overlap, and spreads overlapping elements evenly within the region of overlap.position_dodge2()
is now the default position adjustment forgeom_boxplot()
, because it handlesvarwidth = TRUE
, and will be considered for other geoms in the future.The
padding
parameter adds a small amount of padding between elements (@karawoo, #2143) and areverse
parameter allows you to reverse the order of placement (@karawoo, #2171). -
New
stat_qq_line()
makes it easy to add a simple line to a Q-Q plot, which makes it easier to judge the fit of the theoretical distribution (@nicksolomon).
-
Improved support for mapping date/time variables to
alpha
,size
,colour
, andfill
aesthetics, includingdate_breaks
anddate_labels
arguments (@karawoo, #1526), and newscale_alpha()
variants (@karawoo, #1526). -
Improved support for ordered factors. Ordered factors throw a warning when mapped to shape (unordered factors do not), and do not throw warnings when mapped to size or alpha (unordered factors do). Viridis is used as the default colour and fill scale for ordered factors (@karawoo, #1526).
-
The
expand
argument ofscale_*_continuous()
andscale_*_discrete()
now accepts separate expansion values for the lower and upper range limits. The expansion limits can be specified using the convenience functionexpand_scale()
.Separate expansion limits may be useful for bar charts, e.g. if one wants the bottom of the bars to be flush with the x axis but still leave some (automatically calculated amount of) space above them:
ggplot(mtcars) + geom_bar(aes(x = factor(cyl))) + scale_y_continuous(expand = expand_scale(mult = c(0, .1)))
It can also be useful for line charts, e.g. for counts over time, where one wants to have a ’hard’ lower limit of y = 0 but leave the upper limit unspecified (and perhaps differing between panels), with some extra space above the highest point on the line (with symmetrical limits, the extra space above the highest point could in some cases cause the lower limit to be negative).
The old syntax for the
expand
argument will, of course, continue to work (@huftis, #1669). -
scale_colour_continuous()
andscale_colour_gradient()
are now controlled by global optionsggplot2.continuous.colour
andggplot2.continuous.fill
. These can be set to"gradient"
(the default) or"viridis"
(@karawoo). -
New
scale_colour_viridis_c()
/scale_fill_viridis_c()
(continuous) andscale_colour_viridis_d()
/scale_fill_viridis_d()
(discrete) make it easy to use Viridis colour scales (@karawoo, #1526). -
Guides for
geom_text()
now accept custom labels withguide_legend(override.aes = list(label = "foo"))
(@brianwdavis, #2458).
-
Strips gain margins on all sides by default. This means that to fully justify text to the edge of a strip, you will need to also set the margins to 0 (@karawoo).
-
Rotated strip labels now correctly understand
hjust
andvjust
parameters at all angles (@karawoo). -
Strip labels now understand justification relative to the direction of the text, meaning that in y facets, the strip text can be placed at either end of the strip using
hjust
(@karawoo). -
Legend titles and labels get a little extra space around them, which prevents legend titles from overlapping the legend at large font sizes (@karawoo, #1881).
-
New
autolayer()
S3 generic (@mitchelloharawild, #1974). This is similar toautoplot()
but produces layers rather than complete plots. -
Custom objects can now be added using
+
if aggplot_add
method has been defined for the class of the object (@thomasp85). -
Theme elements can now be subclassed. Add a
merge_element
method to control how properties are inherited from the parent element. Add anelement_grob
method to define how elements are rendered into grobs (@thomasp85, #1981). -
Coords have gained new extension mechanisms.
If you have an existing coord extension, you will need to revise the specification of the
train()
method. It is now calledsetup_panel_params()
(better reflecting what it actually does) and now has argumentsscale_x
, andscale_y
(the x and y scales respectively) andparam
, a list of plot specific parameters generated bysetup_params()
.What was formerly called
scale_details
(in coords),panel_ranges
(in layout) andpanel_scales
(in geoms) are now consistently calledpanel_params
(#1311). These are parameters of the coord that vary from panel to panel. -
ggplot_build()
andggplot_gtable()
are now generics, so ggplot-subclasses can define additional behavior during the build stage. -
guide_train()
,guide_merge()
,guide_geom()
, andguide_gengrob()
are now exported as they are needed if you want to design your own guide. They are not currently documented; use at your own risk (#2528). -
scale_type()
generic is now exported and documented. Use this if you want to extend ggplot2 to work with a new type of vector.
-
facet_grid()
gives a more informative error message if you try to use a variable in both rows and cols (#1928). -
facet_grid()
andfacet_wrap()
both give better error messages if you attempt to use an unsupported coord with free scales (#2049). -
label_parsed()
works once again (#2279). -
You can now style the background of horizontal and vertical strips independently with
strip.background.x
andstrip.background.y
theme settings (#2249).
-
discrete_scale()
documentation now inherits shared definitions fromcontinuous_scale()
(@alistaire47, #2052). -
guide_colorbar()
shows all colours of the scale (@has2k1, #2343). -
scale_identity()
once again produces legends by default (#2112). -
Tick marks for secondary axes with strong transformations are more accurately placed (@thomasp85, #1992).
-
Missing line types now reliably generate missing lines (with standard warning) (#2206).
-
Legends now ignore set aesthetics that are not length one (#1932).
-
All colour and fill scales now have an
aesthetics
argument that can be used to set the aesthetic(s) the scale works with. This makes it possible to apply a colour scale to both colour and fill aesthetics at the same time, viaaesthetics = c("colour", "fill")
(@clauswilke). -
Three new generic scales work with any aesthetic or set of aesthetics:
scale_continuous_identity()
,scale_discrete_identity()
, andscale_discrete_manual()
(@clauswilke). -
scale_*_gradient2()
now consistently omits points outside limits by rescaling after the limits are enforced (@foo-bar-baz-qux, #2230).
-
geom_label()
now correctly produces unbordered labels whenlabel.size
is 0, even when saving to PDF (@bfgray3, #2407). -
layer()
gives considerably better error messages for incorrectly specifiedgeom
,stat
, orposition
(#2401). -
In all layers that use it,
linemitre
now defaults to 10 (instead of 1) to better match base R. -
geom_boxplot()
now supplies a default value if nox
aesthetic is present (@foo-bar-baz-qux, #2110). -
geom_density()
drops groups with fewer than two data points and throws a warning. For groups with two data points, density values are now calculated withstats::density
(@karawoo, #2127). -
geom_segment()
now also takes alinejoin
parameter. This allows more control over the appearance of the segments, which is especially useful for plotting thick arrows (@Ax3man, #774). -
geom_smooth()
now reports the formula used whenmethod = "auto"
(@davharris #1951).geom_smooth()
now orders by thex
aesthetic, making it easier to pass pre-computed values without manual ordering (@izahn, #2028). It also now knows it hasymin
andymax
aesthetics (#1939). The legend correctly reflects the status of these
argument when used with stats other than the default (@clauswilke, #1546). -
geom_tile()
now once again interpretswidth
andheight
correctly (@malcolmbarrett, #2510). -
position_jitter()
andposition_jitterdodge()
gain aseed
argument that allows the specification of a random seed for reproducible jittering (@krlmlr, #1996 and @slowkow, #2445). -
stat_density()
has better behaviour if all groups are dropped because they are too small (#2282). -
stat_summary_bin()
now understands thebreaks
parameter (@karawoo, #2214). -
stat_bin()
now accepts functions forbinwidth
. This allows better binning when faceting along variables with different ranges (@botanize). -
stat_bin()
andgeom_histogram()
now sum correctly when using theweight
aesthetic (@jiho, #1921). -
stat_bin()
again uses correct scaling for the computed variablendensity
(@timgoodman, #2324). -
stat_bin()
andstat_bin_2d()
now properly handle thebreaks
parameter when the scales are transformed (@has2k1, #2366). -
update_geom_defaults()
andupdate_stat_defaults()
allow American spelling of aesthetic parameters (@foo-bar-baz-qux, #2299). -
The
show.legend
parameter now accepts a named logical vector to hide/show only some aesthetics in the legend (@tutuchan, #1798). -
Layers now silently ignore unknown aesthetics with value
NULL
(#1909).
-
Clipping to the plot panel is now configurable, through a
clip
argument to coordinate systems, e.g.coord_cartesian(clip = "off")
(@clauswilke, #2536). -
Like scales, coordinate systems now give you a message when you're replacing an existing coordinate system (#2264).
-
coord_polar()
now draws secondary axis ticks and labels (@dylan-stark, #2072), and can draw the radius axis on the right (@thomasp85, #2005). -
coord_trans()
now generates a warning when a transformation generates non-finite values (@foo-bar-baz-qux, #2147).
-
Complete themes now always override all elements of the default theme (@has2k1, #2058, #2079).
-
Themes now set default grid colour in
panel.grid
rather than individually inpanel.grid.major
andpanel.grid.minor
individually. This makes it slightly easier to customise the theme (#2352). -
Fixed bug when setting strips to
element_blank()
(@thomasp85). -
Axes positioned on the top and to the right can now customize their ticks and lines separately (@thomasp85, #1899).
-
Built-in themes gain parameters
base_line_size
andbase_rect_size
which control the default sizes of line and rectangle elements (@karawoo, #2176). -
Default themes use
rel()
to set line widths (@baptiste). -
Themes were tweaked for visual consistency and more graceful behavior when changing the base font size. All absolute heights or widths were replaced with heights or widths that are proportional to the base font size. One relative font size was eliminated (@clauswilke).
-
The height of descenders is now calculated solely on font metrics and doesn't change with the specific letters in the string. This fixes minor alignment issues with plot titles, subtitles, and legend titles (#2288, @clauswilke).
-
guide_colorbar()
is more configurable: tick marks and color bar frame can now by styled with argumentsticks.colour
,ticks.linewidth
,frame.colour
,frame.linewidth
, andframe.linetype
(@clauswilke). -
guide_colorbar()
now useslegend.spacing.x
andlegend.spacing.y
correctly, and it can handle multi-line titles. Minor tweaks were made toguide_legend()
to make sure the two legend functions behave as similarly as possible (@clauswilke, #2397 and #2398). -
The theme elements
legend.title
andlegend.text
now respect the settings ofmargin
,hjust
, andvjust
(@clauswilke, #2465, #1502). -
Non-angle parameters of
label.theme
ortitle.theme
can now be set inguide_legend()
andguide_colorbar()
(@clauswilke, #2544).
-
fortify()
gains a method for tbls (@karawoo, #2218). -
ggplot
gains a method forgrouped_df
s that adds a.group
variable, which computes a unique value for each group. Use it withaes(group = .group)
(#2351). -
ggproto()
produces objects with classc("ggproto", "gg")
, allowing for a more informative error message when adding layers, scales, or other ggproto objects (@jrnold, #2056). -
ggsave()
's DPI argument now supports 3 string options: "retina" (320 DPI), "print" (300 DPI), and "screen" (72 DPI) (@foo-bar-baz-qux, #2156).ggsave()
now uses full argument names to avoid partial match warnings (#2355), and correctly restores the previous graphics device when several graphics devices are open (#2363). -
print.ggplot()
now returns the original ggplot object, instead of the output fromggplot_build()
. Also, the object returned fromggplot_build()
now has the class"ggplot_built"
(#2034). -
map_data()
now works even when purrr is loaded (tidyverse#66). -
New functions
summarise_layout()
,summarise_coord()
, andsummarise_layers()
summarise the layout, coordinate systems, and layers of a built ggplot object (#2034, @wch). This provides a tested API that (e.g.) shiny can depend on. -
Updated startup messages reflect new resources (#2410, @mine-cetinkaya-rundel).
- Fix usage of
structure(NULL)
for R-devel compatibility (#1968).
Thanks to @hrbrmstr plots now have subtitles and captions, which can be set with
the subtitle
and caption
arguments to ggtitle()
and labs()
. You can
control their appearance with the theme settings plot.caption
and
plot.subtitle
. The main plot title is now left-aligned to better work better
with a subtitle. The caption is right-aligned (@hrbrmstr).
position_stack()
and position_fill()
now sort the stacking order to match
grouping order. This allows you to control the order through grouping, and
ensures that the default legend matches the plot (#1552, #1593). If you want the
opposite order (useful if you have horizontal bars and horizontal legend), you
can request reverse stacking by using position = position_stack(reverse = TRUE)
(#1837).
position_stack()
and position_fill()
now accepts negative values which will
create stacks extending below the x-axis (#1691).
position_stack()
and position_fill()
gain a vjust
argument which makes it
easy to (e.g.) display labels in the middle of stacked bars (#1821).
geom_col()
was added to complement geom_bar()
(@hrbrmstr). It uses
stat="identity"
by default, making the y
aesthetic mandatory. It does not
support any other stat_()
and does not provide fallback support for the
binwidth
parameter. Examples and references in other functions were updated to
demonstrate geom_col()
usage.
When creating a layer, ggplot2 will warn if you use an unknown aesthetic or an unknown parameter. Compared to the previous version, this is stricter for aesthetics (previously there was no message), and less strict for parameters (previously this threw an error) (#1585).
The facet system, as well as the internal panel class, has been rewritten in
ggproto. Facets are now extendable in the same manner as geoms and stats, as
described in vignette("extending-ggplot2")
.
We have also added the following new fatures.
-
facet_grid()
andfacet_wrap()
now allow expressions in their faceting formulas (@DanRuderman, #1596). -
When
facet_wrap()
results in an uneven number of panels, axes will now be drawn underneath the hanging panels (fixes #1607) -
Strips can now be freely positioned in
facet_wrap()
using thestrip.position
argument (deprecatesswitch
). -
The relative order of panel, strip, and axis can now be controlled with the theme setting
strip.placement
that takes eitherinside
(strip between panel and axis) oroutside
(strip after axis). -
The theme option
panel.margin
has been deprecated in favour ofpanel.spacing
to more clearly communicate intent.
Unfortunately there was a major oversight in the construction of ggproto which lead to extensions capturing the super object at package build time, instead of at package run time (#1826). This problem has been fixed, but requires re-installation of all extension packages.
- The position of x and y axes can now be changed using the
position
argument inscale_x_*
andscale_y_*
which can taketop
andbottom
, andleft
andright
respectively. The themes of top and right axes can be modified using the.top
and.right
modifiers toaxis.text.*
andaxis.title.*
.
-
scale_x_continuous()
andscale_y_continuous()
can now display a secondary axis that is a one-to-one transformation of the primary axis (e.g. degrees Celcius to degrees Fahrenheit). The secondary axis will be positioned opposite to the primary axis and can be controlled with thesec.axis
argument to the scale constructor. -
Scales worry less about having breaks. If no breaks can be computed, the plot will work instead of throwing an uninformative error (#791). This is particularly helpful when you have facets with free scales, and not all panels contain data.
-
Scales now warn when transformation introduces infinite values (#1696).
-
scale_*_datetime()
now supports time zones. It will use the timezone attached to the varaible by default, but can be overridden with thetimezone
argument. -
New
scale_x_time()
andscale_y_time()
generate reasonable default breaks and labels for hms vectors (#1752).
The treatment of missing values by discrete scales has been thoroughly overhauled (#1584). The underlying principle is that we can naturally represent missing values on discrete variables (by treating just like another level), so by default we should.
This principle applies to:
- character vectors
- factors with implicit NA
- factors with explicit NA
And to all scales (both position and non-position.)
Compared to the previous version of ggplot2, there are three main changes:
-
scale_x_discrete()
andscale_y_discrete()
always show discrete NA, regardless of their source -
If present,
NA
s are shown in discete legends. -
All discrete scales gain a
na.translate
argument that allows you to control whetherNA
s are translated to something that can be visualised, or should be left as missing. Note that if you don't translate (i.e.na.translate = FALSE)
the missing values will passed on to the layer, which will warning that it's dropping missing values. To suppress the warnings, you'll also need to addna.rm = TRUE
to the layer call.
There were also a number of other smaller changes
- Correctly use scale expansion factors.
- Don't preserve space for dropped levels (#1638).
- Only issue one warning when when asking for too many levels (#1674).
- Unicode labels work better on Windows (#1827).
- Warn when used with only continuous data (#1589)
-
The
theme()
constructor now has named arguments rather than ellipses. This should make autocomplete substantially more useful. The documentation (including examples) has been considerably improved. -
Built-in themes are more visually homogeneous, and match
theme_grey
better. (@jiho, #1679) -
When computing the height of titles, ggplot2 now includes the height of the descenders (i.e. the bits of
g
andy
that hang beneath the baseline). This improves the margins around titles, particularly the y axis label (#1712). I have also very slightly increased the inner margins of axis titles, and removed the outer margins. -
Theme element inheritance is now easier to work with as modification now overrides default
element_blank
elements (#1555, #1557, #1565, #1567) -
Horizontal legends (i.e. legends on the top or bottom) are horizontally aligned by default (#1842). Use
legend.box = "vertical"
to switch back to the previous behaviour. -
element_line()
now takes anarrow
argument to specify arrows at the end of lines (#1740)
There were a number of tweaks to the theme elements that control legends:
-
legend.justification
now controls appearance will plotting the legend outside of the plot area. For example, you can usetheme(legend.justification = "top")
to make the legend align with the top of the plot. -
panel.margin
andlegend.margin
have been renamed topanel.spacing
andlegend.spacing
respectively, to better communicate intent (they only affect spacing between legends and panels, not the margins around them) -
legend.margin
now controls margin around individual legends. -
New
legend.box.background
,legend.box.spacing
, andlegend.box.margin
control the background, spacing, and margin of the legend box (the region that contains all legends).
-
ggplot2 now imports tibble. This ensures that all built-in datasets print compactly even if you haven't explicitly loaded tibble or dplyr (#1677).
-
Class of aesthetic mapping is preserved when adding
aes()
objects (#1624). -
+.gg
now works for lists that include data frames. -
annotation_x()
now works in the absense of global data (#1655) -
geom_*(show.legend = FALSE)
now works forguide_colorbar
. -
geom_boxplot()
gains newoutlier.alpha
(@jonathan-g) andoutlier.fill
(@schloerke, #1787) parameters to control the alpha/fill of outlier points independently of the alpha of the boxes. -
position_jitter()
(and hencegeom_jitter()
) now correctly computes the jitter width/jitter when supplied by the user (#1775, @has2k1). -
geom_contour()
more clearly describes what inputs it needs (#1577). -
geom_curve()
respects thelineend
paramater (#1852). -
geom_histogram()
andstat_bin()
understand thebreaks
parameter once more. (#1665). The floating point adjustment for histogram bins is now actually used - it was previously inadvertently ignored (#1651). -
geom_violin()
no longer transforms quantile lines with the alpha aesthetic (@mnbram, #1714). It no longer errors when quantiles are requested but data have zero range (#1687). Whentrim = FALSE
it once again has a nice range that allows the density to reach zero (by extending the range 3 bandwidths to either side of the data) (#1700). -
geom_dotplot()
works better when faceting and binning on the y-axis. (#1618, @has2k1). -
geom_hexbin()
once again supports..density..
(@mikebirdgeneau, #1688). -
geom_step()
gives useful warning if only one data point in layer (#1645). -
layer()
gains newcheck.aes
andcheck.param
arguments. These allow geom/stat authors to optional suppress checks for known aesthetics/parameters. Currently this is used only ingeom_blank()
which powersexpand_limits()
(#1795). -
All
stat_*()
display a better error message when required aesthetics are missing. -
stat_bin()
andstat_summary_hex()
now accept length 1binwidth
(#1610) -
stat_density()
gains new argumentn
, which is passed to underlying functionstats::density
("number of equally spaced points at which the density is to be estimated"). (@hbuschme) -
stat_binhex()
now again returnscount
rather thanvalue
(#1747) -
stat_ecdf()
respectspad
argument (#1646). -
stat_smooth()
once again informs you about the method it has chosen. It also correctly calculates the size of the largest group within facets. -
x
andy
scales are now symmetric regarding the list of aesthetics they accept:xmin_final
,xmax_final
,xlower
,xmiddle
andxupper
are now validx
aesthetics. -
Scale
extensions can now override themake_title
andmake_sec_title
methods to let the scale modify the axis/legend titles. -
The random stream is now reset after calling
.onAttach()
(#2409).
-
When mapping an aesthetic to a constant (e.g.
geom_smooth(aes(colour = "loess")))
), the default guide title is the name of the aesthetic (i.e. "colour"), not the value (i.e. "loess") (#1431). -
layer()
now accepts a function as the data argument. The function will be applied to the data passed to theggplot()
function and must return a data.frame (#1527, @thomasp85). This is a more general version of the deprecatedsubset
argument. -
theme_update()
now uses the+
operator instead of%+replace%
, so that unspecified values will no longer beNULL
ed out.theme_replace()
preserves the old behaviour if desired (@oneillkza, #1519). -
stat_bin()
has been overhauled to use the same algorithm as ggvis, which has been considerably improved thanks to the advice of Randy Prium (@rpruim). This includes:-
Better arguments and a better algorithm for determining the origin. You can now specify either
boundary
or thecenter
of a bin.origin
has been deprecated in favour of these arguments. -
drop
is deprecated in favour ofpad
, which adds extra 0-count bins at either end (needed for frequency polygons).geom_histogram()
defaults topad = FALSE
which considerably improves the default limits for the histogram, especially when the bins are big (#1477). -
The default algorithm does a (somewhat) better job at picking nice widths and origins across a wider range of input data.
-
bins = n
now gives a histogram withn
bins, notn + 1
(#1487).
-
-
All
\donttest{}
examples run. -
All
geom_()
andstat_()
functions now have consistent argument order: data + mapping, then geom/stat/position, then...
, then specific arguments, then arguments common to all layers (#1305). This may break code if you were previously relying on partial name matching, but in the long-term should make ggplot2 easier to use. In particular, you can now set then
parameter ingeom_density2d()
without it partially matchingna.rm
(#1485). -
For geoms with both
colour
andfill
,alpha
once again only affects fill (Reverts #1371, #1523). This was causing problems for people. -
facet_wrap()
/facet_grid()
works with multiple empty panels of data (#1445). -
facet_wrap()
correctly swapsnrow
andncol
when faceting vertically (#1417). -
ggsave("x.svg")
now uses svglite to produce the svg (#1432). -
geom_boxplot()
now understandsoutlier.color
(#1455). -
geom_path()
knows that "solid" (not just 1) represents a solid line (#1534). -
geom_ribbon()
preserves missing values so they correctly generate a gap in the ribbon (#1549). -
geom_tile()
once again acceptswidth
andheight
parameters (#1513). It usesdraw_key_polygon()
for better a legend, including a coloured outline (#1484). -
layer()
now automatically adds ana.rm
parameter if none is explicitly supplied. -
position_jitterdodge()
now works on all possible dodge aesthetics, e.g.color
,linetype
etc. instead of only based onfill
(@bleutner) -
position = "nudge"
now works (although it doesn't do anything useful) (#1428). -
The default scale for columns of class "AsIs" is now "identity" (#1518).
-
scale_*_discrete()
has better defaults when used with purely continuous data (#1542). -
scale_size()
warns when used with categorical data. -
scale_size()
,scale_colour()
, andscale_fill()
gain date and date-time variants (#1526). -
stat_bin_hex()
andstat_bin_summary()
now use the same underlying algorithm so results are consistent (#1383).stat_bin_hex()
now accepts aweight
aesthetic. To be consistent with related stats, the output variable fromstat_bin_hex()
is now value instead of count. -
stat_density()
gains abw
parameter which makes it easy to get consistent smoothing between facets (@jiho) -
stat-density-2d()
no longer ignores theh
parameter, and now acceptsbins
andbinwidth
parameters to control the number of contours (#1448, @has2k1). -
stat_ecdf()
does a better job of adding padding to -Inf/Inf, and gains an argumentpad
to suppress the padding if not needed (#1467). -
stat_function()
gains anxlim
parameter (#1528). It once again works with discrete x values (#1509). -
stat_summary()
preserves sorted x order which avoids artefacts when display results withgeom_smooth()
(#1520). -
All elements should now inherit correctly for all themes except
theme_void()
. (@Katiedaisey, #1555) -
theme_void()
was completely void of text but facets and legends still need labels. They are now visible (@jiho). -
You can once again set legend key and height width to unit arithmetic objects (like
2 * unit(1, "cm")
) (#1437). -
Eliminate spurious warning if you have a layer with no data and no aesthetics (#1451).
-
Removed a superfluous comma in
theme-defaults.r
code (@jschoeley) -
Fixed a compatibility issue with
ggproto
and R versions prior to 3.1.2. (#1444) -
Fixed issue where
coord_map()
fails when given an explicitparameters
argument (@tdmcarthur, #1729) -
Fixed issue where
geom_errorbarh()
had a requiredx
aesthetic (#1933)
-
ggplot no longer throws an error if your plot has no layers. Instead it automatically adds
geom_blank()
(#1246). -
New
cut_width()
is a convenient replacement for the verboseplyr::round_any()
, with the additional benefit of offering finer control. -
New
geom_count()
is a convenient alias tostat_sum()
. Use it when you have overlapping points on a scatterplot.stat_sum()
now defaults to using counts instead of proportions. -
New
geom_curve()
adds curved lines, with a similar specification togeom_segment()
(@veraanadi, #1088). -
Date and datetime scales now have
date_breaks
,date_minor_breaks
anddate_labels
arguments so that you never need to use the longscales::date_breaks()
orscales::date_format()
. -
geom_bar()
now has it's own stat, distinct fromstat_bin()
which was also used bygeom_histogram()
.geom_bar()
now usesstat_count()
which counts values at each distinct value of x (i.e. it does not bin the data first). This can be useful when you want to show exactly which values are used in a continuous variable. -
geom_point()
gains astroke
aesthetic which controls the border width of shapes 21-25 (#1133, @SeySayux).size
andstroke
are additive so a point withsize = 5
andstroke = 5
will have a diameter of 10mm. (#1142) -
New
position_nudge()
allows you to slightly offset labels (or other geoms) from their corresponding points (#1109). -
scale_size()
now maps values to area, not radius. Usescale_radius()
if you want the old behaviour (not recommended, except perhaps for lines). -
New
stat_summary_bin()
works likestat_summary()
but on binned data. It's a generalisation ofstat_bin()
that can compute any aggregate, not just counts (#1274). Both default tomean_se()
if no aggregation functions are supplied (#1386). -
Layers are now much stricter about their arguments - you will get an error if you've supplied an argument that isn't an aesthetic or a parameter. This is likely to cause some short-term pain but in the long-term it will make it much easier to spot spelling mistakes and other errors (#1293).
This change does break a handful of geoms/stats that used
...
to pass additional arguments on to the underlying computation. Nowgeom_smooth()
/stat_smooth()
andgeom_quantile()
/stat_quantile()
usemethod.args
instead (#1245, #1289); andstat_summary()
(#1242),stat_summary_hex()
, andstat_summary2d()
usefun.args
.
There is now an official mechanism for defining Stats, Geoms, and Positions in
other packages. See vignette("extending-ggplot2")
for details.
-
All Geoms, Stats and Positions are now exported, so you can inherit from them when making your own objects (#989).
-
ggplot2 no longer uses proto or reference classes. Instead, we now use ggproto, a new OO system designed specifically for ggplot2. Unlike proto and RC, ggproto supports clean cross-package inheritance. Creating a new OO system isn't usually the right way to solve a problem, but I'm pretty sure it was necessary here. Read more about it in the vignette.
-
aes_()
replacesaes_q()
. It also supports formulas, so the most concise SE version ofaes(carat, price)
is nowaes_(~carat, ~price)
. You may want to use this form in packages, as it will avoid spuriousR CMD check
warnings about undefined global variables.
-
geom_text()
has been overhauled to make labelling your data a little easier. It:-
nudge_x
andnudge_y
arguments let you offset labels from their corresponding points (#1120). -
check_overlap = TRUE
provides a simple way to avoid overplotting of labels: labels that would otherwise overlap are omitted (#1039). -
hjust
andvjust
can now be character vectors: "left", "center", "right", "bottom", "middle", "top". New options include "inward" and "outward" which align text towards and away from the center of the plot respectively.
-
-
geom_label()
works likegeom_text()
but draws a rounded rectangle underneath each label (#1039). This is useful when you want to label plots that are dense with data.
-
The little used
aes_auto()
has been deprecated. -
aes_q()
has been replaced withaes_()
to be consistent with SE versions of NSE functions in other packages. -
The
order
aesthetic is officially deprecated. It never really worked, and was poorly documented. -
The
stat
andposition
arguments toqplot()
have been deprecated.qplot()
is designed for quick plots - if you need to specify position or stat, useggplot()
instead. -
The theme setting
axis.ticks.margin
has been deprecated: now use the margin property ofaxis.text
. -
stat_abline()
,stat_hline()
andstat_vline()
have been removed: these were never suitable for use other than withgeom_abline()
etc and were not documented. -
show_guide
has been renamed toshow.legend
: this more accurately reflects what it does (controls appearance of layer in legend), and uses the same convention as other ggplot2 arguments (i.e. a.
between names). (Yes, I know that's inconsistent with function names with use_
, but it's too late to change now.)
A number of geoms have been renamed to be internally consistent:
-
stat_binhex()
andstat_bin2d()
have been renamed tostat_bin_hex()
andstat_bin_2d()
(#1274).stat_summary2d()
has been renamed tostat_summary_2d()
,geom_density2d()
/stat_density2d()
has been renamed togeom_density_2d()
/stat_density_2d()
. -
stat_spoke()
is nowgeom_spoke()
since I realised it's a reparameterisation ofgeom_segment()
. -
stat_bindot()
has been removed because it's so tightly coupled togeom_dotplot()
. If you happened to usestat_bindot()
, just change togeom_dotplot()
(#1194).
All defunct functions have been removed.
-
The default
theme_grey()
background colour has been changed from "grey90" to "grey92": this makes the background a little less visually prominent. -
Labels and titles have been tweaked for readability:
-
Axes labels are darker.
-
Legend and axis titles are given the same visual treatment.
-
The default font size dropped from 12 to 11. You might be surprised that I've made the default text size smaller as it was already hard for many people to read. It turns out there was a bug in RStudio (fixed in 0.99.724), that shrunk the text of all grid based graphics. Once that was resolved the defaults seemed too big to my eyes.
-
More spacing between titles and borders.
-
Default margins scale with the theme font size, so the appearance at larger font sizes should be considerably improved (#1228).
-
-
alpha
now affects both fill and colour aesthetics (#1371). -
element_text()
gains a margins argument which allows you to add additional padding around text elements. To help see what's going on usedebug = TRUE
to display the text region and anchors. -
The default font size in
geom_text()
has been decreased from 5mm (14 pts) to 3.8 mm (11 pts) to match the new default theme sizes. -
A diagonal line is no longer drawn on bar and rectangle legends. Instead, the border has been tweaked to be more visible, and more closely match the size of line drawn on the plot.
-
geom_pointrange()
andgeom_linerange()
get vertical (not horizontal) lines in the legend (#1389). -
The default line
size
forgeom_smooth()
has been increased from 0.5 to 1 to make it easier to see when overlaid on data. -
geom_bar()
andgeom_rect()
use a slightly paler shade of grey so they aren't so visually heavy. -
geom_boxplot()
now colours outliers the same way as the boxes. -
geom_point()
now uses shape 19 instead of 16. This looks much better on the default Linux graphics device. (It's very slightly smaller than the old point, but it shouldn't affect any graphics significantly) -
Sizes in ggplot2 are measured in mm. Previously they were converted to pts (for use in grid) by multiplying by 72 / 25.4. However, grid uses printer's points, not Adobe (big pts), so sizes are now correctly multiplied by 72.27 / 25.4. This is unlikely to noticeably affect display, but it's technically correct (https://youtu.be/hou0lU8WMgo).
-
The default legend will now allocate multiple rows (if vertical) or columns (if horizontal) in order to make a legend that is more likely to fit on the screen. You can override with the
nrow
/ncol
arguments toguide_legend()
p <- ggplot(mpg, aes(displ,hwy, colour = model)) + geom_point() p p + theme(legend.position = "bottom") # Previous behaviour p + guides(colour = guide_legend(ncol = 1))
-
New
theme_void()
is completely empty. It's useful for plots with non- standard coordinates or for drawings (@jiho, #976). -
New
theme_dark()
has a dark background designed to make colours pop out (@jiho, #1018) -
theme_minimal()
became slightly more minimal by removing the axis ticks: labels now line up directly beneath grid lines (@tomschloss, #1084) -
New theme setting
panel.ontop
(logical) make it possible to place background elements (i.e., gridlines) on top of data. Best used with transparentpanel.background
(@noamross. #551).
The facet labelling system was updated with many new features and a more flexible interface (@lionel-). It now works consistently across grid and wrap facets. The most important user visible changes are:
-
facet_wrap()
gains alabeller
option (#25). -
facet_grid()
andfacet_wrap()
gain aswitch
argument to display the facet titles near the axes. When switched, the labels become axes subtitles.switch
can be set to "x", "y" or "both" (the latter only for grids) to control which margin is switched.
The labellers (such as label_value()
or label_both()
) also get
some new features:
-
They now offer the
multi_line
argument to control whether to display composite facets (those specified as~var1 + var2
) on one or multiple lines. -
In
label_bquote()
you now refer directly to the names of variables. With this change, you can create math expressions that depend on more than one variable. This math expression can be specified either for the rows or the columns and you can also provide different expressions to each margin.As a consequence of these changes, referring to
x
in backquoted expressions is deprecated. -
Similarly to
label_bquote()
,labeller()
now take.rows
and.cols
arguments. In addition, it also takes.default
.labeller()
is useful to customise how particular variables are labelled. The three additional arguments specify how to label the variables are not specifically mentioned, respectively for rows, columns or both. This makes it especially easy to set up a project-wide labeller dispatcher that can be reused across all your plots. See the documentation for an example. -
The new labeller
label_context()
adapts to the number of factors facetted over. With a single factor, it displays only the values, just as before. But with multiple factors in a composite margin (e.g. with~cyl + am
), the labels are passed over tolabel_both()
. This way the variables names are displayed with the values to help identifying them.
On the programming side, the labeller API has been rewritten in order
to offer more control when faceting over multiple factors (e.g. with
formulae such as ~cyl + am
). This also means that if you have
written custom labellers, you will need to update them for this
version of ggplot.
-
Previously, a labeller function would take
variable
andvalue
arguments and return a character vector. Now, they take a data frame of character vectors and return a list. The input data frame has one column per factor facetted over and each column in the returned list becomes one line in the strip label. See documentation for more details. -
The labels received by a labeller now contain metadata: their margin (in the "type" attribute) and whether they come from a wrap or a grid facet (in the "facet" attribute).
-
Note that the new
as_labeller()
function operator provides an easy way to transform an existing function to a labeller function. The existing function just needs to take and return a character vector.
-
Improved documentation for
aes()
,layer()
and much much more. -
I've tried to reduce the use of
...
so that you can see all the documentation in one place rather than having to integrate multiple pages. In some cases this has involved adding additional arguments to geoms to make it more clear what you can do:-
geom_smooth()
gains explicitmethod
,se
andformula
arguments. -
geom_histogram()
gainsbinwidth
,bins
,origin
andright
arguments. -
geom_jitter()
gainswidth
andheight
arguments to make it easier to control the amount of jittering without using the lengthyposition_jitter()
function (#1116)
-
-
Use of
qplot()
in examples has been minimised (#1123, @hrbrmstr). This is inline with the 2nd edition of the ggplot2 box, which minimises the use ofqplot()
in favour ofggplot()
. -
Tighly linked geoms and stats (e.g.
geom_boxplot()
andstat_boxplot()
) are now documented in the same file so you can see all the arguments in one place. Variations of the same idea (e.g.geom_path()
,geom_line()
, andgeom_step()
) are also documented together. -
It's now obvious that you can set the
binwidth
parameter forstat_bin_hex()
,stat_summary_hex()
,stat_bin_2d()
, andstat_summary_2d()
. -
The internals of positions have been cleaned up considerably. You're unlikely to notice any external changes, although the documentation should be a little less confusing since positions now don't list parameters they never use.
-
All datasets have class
tbl_df
so if you also use dplyr, you get a better print method. -
economics
has been brought up to date to 2015-04-01. -
New
economics_long
is the economics data in long form. -
New
txhousing
dataset containing information about the Texas housing market. Useful for examples that need multiple time series, and for demonstrating model+vis methods. -
New
luv_colours
dataset which contains the locations of all built-incolors()
in Luv space. -
movies
has been moved into its own package, ggplot2movies, because it was large and not terribly useful. If you've used the movies dataset, you'll now need to explicitly load the package withlibrary(ggplot2movies)
.
-
All partially matched arguments and
$
have been been replaced with full matches (@jimhester, #1134). -
ggplot2 now exports
alpha()
from the scales package (#1107), andarrow()
andunit()
from grid (#1225). This means you don't need attach scales/grid or doscales::
/grid::
for these commonly used functions. -
aes_string()
now only parses character inputs. This fixes bugs when using it with numbers and non defaultOutDec
settings (#1045). -
annotation_custom()
automatically adds a unique id to each grob name, making it easier to plot multiple grobs with the same name (e.g. grobs of ggplot2 graphics) in the same plot (#1256). -
borders()
now accepts xlim and ylim arguments for specifying the geographical region of interest (@markpayneatwork, #1392). -
coord_cartesian()
applies the same expansion factor to limits as for scales. You can suppress withexpand = FALSE
(#1207). -
coord_trans()
now works when breaks are suppressed (#1422). -
cut_number()
gives error message if the number of requested bins can be created because there are two few unique values (#1046). -
Character labels in
facet_grid()
are no longer (incorrectly) coerced into factors. This caused problems with custom label functions (#1070). -
facet_wrap()
andfacet_grid()
now allow you to use non-standard variable names by surrounding them with backticks (#1067). -
facet_wrap()
more carefully checks itsnrow
andncol
arguments to ensure that they're specified correctly (@richierocks, #962) -
facet_wrap()
gains adir
argument to control the direction the panels are wrapped in. The default is "h" for horizontal. Use "v" for vertical layout (#1260). -
geom_abline()
,geom_hline()
andgeom_vline()
have been rewritten to have simpler behaviour and be more consistent:-
stat_abline()
,stat_hline()
andstat_vline()
have been removed: these were never suitable for use other than withgeom_abline()
etc and were not documented. -
geom_abline()
,geom_vline()
andgeom_hline()
are bound tostat_identity()
andposition_identity()
-
Intercept parameters can no longer be set to a function.
-
They are all documented in one file, since they are so closely related.
-
-
geom_bin2d()
will now let you specify one dimension's breaks exactly, without touching the other dimension's default breaks at all (#1126). -
geom_crossbar()
sets grouping correctly so you can display multiple crossbars on one plot. It also makes the defaultfatten
argument a little bigger to make the middle line more obvious (#1125). -
geom_histogram()
andgeom_smooth()
now only inform you about the default values once per layer, rather than once per panel (#1220). -
geom_pointrange()
gainsfatten
argument so you can control the size of the point relative to the size of the line. -
geom_segment()
annotations were not transforming with scales (@BrianDiggs, #859). -
geom_smooth()
is no longer so chatty. If you want to know what the deafult smoothing method is, look it up in the documentation! (#1247) -
geom_violin()
now has the ability to draw quantile lines (@DanRuderman). -
ggplot()
now captures the parent frame to use for evaluation, rather than always defaulting to the global environment. This should make ggplot more suitable to use in more situations (e.g. with knitr) -
ggsave()
has been simplified a little to make it easier to maintain. It no longer checks that you're printing a ggplot2 object (so now also works with any grid grob) (#970), and always requires a filename. Parameterdevice
now supports character argument to specify which supported device to use ('pdf', 'png', 'jpeg', etc.), for when it cannot be correctly inferred from the file extension (for example when a temporary filename is supplied server side in shiny apps) (@sebkopf, #939). It no longer opens a graphics device if one isn't already open - this is annoying when you're running from a script (#1326). -
guide_colorbar()
creates correct legend if only one color (@krlmlr, #943). -
guide_colorbar()
no longer fails when the legend is empty - previously this often masked misspecifications elsewhere in the plot (#967). -
New
layer_data()
function extracts the data used for plotting for a given layer. It's mostly useful for testing. -
User supplied
minor_breaks
can now be supplied on the same scale as the data, and will be automatically transformed with by scale (#1385). -
You can now suppress the appearance of an axis/legend title (and the space that would allocated for it) with
NULL
in thescale_
function. To use the default lable, usewaiver()
(#1145). -
Position adjustments no longer warn about potentially varying ranges because the problem rarely occurs in practice and there are currently a lot of false positives since I don't understand exactly what FP criteria I should be testing.
-
scale_fill_grey()
now uses red for missing values. This matchesscale_colour_grey()
and makes it obvious where missing values lie. Override withna.value
. -
scale_*_gradient2()
defaults to using Lab colour space. -
scale_*_gradientn()
now allowscolours
orcolors
(#1290) -
scale_y_continuous()
now also transforms thelower
,middle
andupper
aesthetics used bygeom_boxplot()
: this only affectsgeom_boxplot(stat = "identity")
(#1020). -
Legends no longer inherit aesthetics if
inherit.aes
is FALSE (#1267). -
lims()
makes it easy to set the limits of any axis (#1138). -
labels = NULL
now works withguide_legend()
andguide_colorbar()
. (#1175, #1183). -
override.aes
now works with American aesthetic spelling, e.g. color -
Scales no longer round data points to improve performance of colour palettes. Instead the scales package now uses a much faster colour interpolation algorithm (#1022).
-
scale_*_brewer()
andscale_*_distiller()
add newdirection
argument ofscales::brewer_pal
, making it easier to change the order of colours (@jiho, #1139). -
scale_x_date()
now clips dates outside the limits in the same way asscale_x_continuous()
(#1090). -
stat_bin()
gainsbins
arguments, which denotes the number of bins. Now you can setbins=100
instead ofbinwidth=0.5
. Note thatbreaks
orbinwidth
will override it (@tmshn, #1158, #102). -
stat_boxplot()
warns if a continuous variable is used for thex
aesthetic without also supplying agroup
aesthetic (#992, @krlmlr). -
stat_summary_2d()
andstat_bin_2d()
now share exactly the same code for determining breaks frombins
,binwidth
, andorigin
. -
stat_summary_2d()
andstat_bin_2d()
now output in tile/raster compatible form instead of rect compatible form. -
Automatically computed breaks do not lead to an error for transformations like "probit" where the inverse can map to infinity (#871, @krlmlr)
-
stat_function()
now always evaluates the function on the original scale. Previously it computed the function on transformed scales, giving incorrect values (@BrianDiggs, #1011). -
strip_dots
works with anonymous functions within calculated aesthetics (e.g.aes(sapply(..density.., function(x) mean(x))))
(#1154, @NikNakk) -
theme()
gainsvalidate = FALSE
parameter to turn off validation, and hence store arbitrary additional data in the themes. (@tdhock, #1121) -
Improved the calculation of segments needed to draw the curve representing a line when plotted in polar coordinates. In some cases, the last segment of a multi-segment line was not drawn (@BrianDiggs, #952)