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Releases: elixir-explorer/explorer

v0.10.1

28 Nov 22:37
@philss philss
v0.10.1
1ca086d
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v0.10.1 Latest
Latest

Fixed

  • Fix creation of series of {:list, {:decimal, ...}} containing empty lists.

  • Use i128 for :coef field in the Rust code.

    This field is a positive, arbitrary precision integer on the Elixir side.
    It's convenient to represent it as a signed i128 because that's what the Decimal dtype expects. While you could technically create an ExDecimal struct with a negative coef, it's not a practical concern.

  • Fix Explorer.DataFrame.print/1 for empty dataframes.

  • Fix datetime encoding overflow.

    Before we were always converting first to a microsecond-based representation then to the final representation. The intermediate conversion is unnecessary and risks overflows when trying to convert to a different time unit later.
    This approach converts directly to i64 from the Elixir struct and time unit.

  • Encode millisecond precision for time and datetime series.

  • Fix list struct print bug.

    Fixes an issue where we can't print columns with a dtype like {:list, {:struct, ...}} where the root of the tree isn't a :struct but it contains a :struct.

Deprecated

  • Remove documentation for deprecated functions to_date/1 and to_time/1.
    They are functions from the Explorer.Series that soon will be removed.

Pull requests

Full Changelog: v0.10.0...v0.10.1

SHA256 of the artifacts

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5c049bd578ef80814863a04fbfb56a593b273dae3aa5e7e8f4da62ffd6e84b9d  libexplorer-v0.10.1-nif-2.15-x86_64-unknown-linux-musl.so.tar.gz

Contributors

maennchen, philss, and 2 other contributors
Assets 15

v0.10.0

24 Oct 00:00
@philss philss
v0.10.0
5ee26d5
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v0.10.0

Added

  • Add support for the decimals data type.

    Decimals dtypes are represented by the {:decimal, precision, scale} tuple,
    where precision can be a positive integer from 0 to 38, and is the maximum number
    of digits that can be represented by the decimal. The scale is the number of
    digits after the decimal point.

    With this addition, we also added the :decimal package as a new dependency.
    The Explorer.Series.from_list/2 function accepts decimal numbers from that
    package as values - %Decimal{}.

    This version has a small number of operations, but is a good foundation.

  • Allow the usage of queries and lazy series outside callbacks and macros.
    This is an improvement to functions that were originally designed to accept callbacks.
    With this change you can now reuse lazy series across different "queries".
    See the Explorer.Query docs for details.

    The affected functions are:

    • Explorer.DataFrame.filter_with/2
    • Explorer.DataFrame.mutate_with/2
    • Explorer.DataFrame.sort_with/2
    • Explorer.DataFrame.summarise_with/2

  • Allow accessing the dataframe inside query.

  • Add "lazy read" support for Parquet and NDJSON from HTTP(s).

  • Expose more options for Explorer.Series.cut/3 and Explorer.Series.qcut/3.
    These options were available in Polars, but not in our APIs.

Fixed

  • Fix creation of series where a nil value inside a list - for a {:list, any()} dtype -
    could result in an incompatible dtype. This fix will prevent panics for list of lists with
    nil entries.

  • Fix Explorer.DataFrame.dump_ndjson/2 when date time is in use.

  • Fix Explorer.Series.product/1 for lazy series.

  • Accept %FSS.HTTP.Entry{} structs in functions like Explorer.DataFrame.from_parquet/2.

  • Fix encode of binaries to terms from series of the {:struct, any()} dtype.
    In case the inner fields of the struct had any binary (:binary dtype), it was
    causing a panic.

Changed

  • Change the defaults of the functions Explorer.Series.cut/3 and Explorer.Series.qcut/3
    to not have "break points" column in the resultant dataframe.
    So the :include_breaks is now false by default.

Pull requests

New Contributors

Full Changelog: v0.9.2...v0.10.0

SHA256 of the artifacts

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62e480e536ef9a132bbc542df4a043f52fa6512a2ed8c2c5165ff4cff47b0e07  libexplorer-v0.10.0-nif-2.15-x86_64-unknown-linux-musl.so.tar.gz

Contributors

philss, mooreryan, and 5 other contributors
Assets 15
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v0.9.2

27 Aug 13:53
@philss philss
v0.9.2
1175ff9
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v0.9.2

Added

  • Add a new :keep option to the mutate_with/3 function and mutate/3 macro.
    This option allows users to control which columns are retained in the output
    dataframe after a mutation operation. You can use :all (the default) or :none.

Fixed

  • Fix handling of "LazySeries" with remote dataframes.
  • Fix typespecs of Explorer.Series.cast/2 by adding a dtype_alias() type.
  • Stop converting io_dtypes() to maps in order to preserve names ordering.

Pull requests

New Contributors

Full Changelog: v0.9.1...v0.9.2

SHA256 of artifacts

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Build with attestations: https://github.com/elixir-explorer/explorer/actions/runs/10579468339

Contributors

philss and brendon9x
Assets 15
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v0.9.1

15 Aug 21:31
@philss philss
v0.9.1
1f2ccbb
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v0.9.1

Added

  • Add support for saving to the cloud using streaming and the IPC format.
    This will enable saving a lazy frame to the cloud without loading it
    entirely in memory. It only supports saves to S3-compatible storage services.

Changed

  • Force garbage collection on remote gc.

Fixed

  • Re-enable support for saving to the cloud using streaming and the Parquet format.
    It's a fix from the release of v0.9.0 that disabled this feature.

  • Fix overwrite of dtypes for Explorer.DataFrame.load_csv/2.
    This was a regression introduced in v0.9.0.

Pull requests

New Contributors

Full Changelog: v0.9.0...v0.9.1

SHA256 of artifacts

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Contributors

balexand, philss, and bryannaegele
Assets 15
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v0.9.0

26 Jul 21:08
@philss philss
v0.9.0
2537c18
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v0.9.0

Added

  • Add initial support for SQL queries.

    The Explorer.DataFrame.sql/3 is a function that accepts a dataframe and a SQL query. The SQL is not validated by Explorer, so the queries will be backend dependent. Right now we have only Polars as the backend.

  • Add support for remote series and dataframes.

    Automatically transfer data between nodes for remote series and dataframes and perform distributed garbage collection.

    The functions in Explorer.DataFrame and Explorer.Series will automatically move operations on remote dataframes to the nodes they belong to.
    The Explorer.Remote module provides additional conveniences for manual placement.

  • Add FLAME integration, so we automatically track remote series and dataframes returned from FLAME calls when the :track_resources option is enabled.
    See FLAME for more.

  • Add Explorer.DataFrame.transform/3 that applies an Elixir function to each row. This function is similar to Explorer.Series.transform/2, and as such, it's considered an expensive operation. So it's recommended only if there is no similar dataframe or series operation available.

  • Improve performance of Explorer.Series.from_list/2 for most of the cases where the :dtype option is given. This is specially true for when the dtype is :binary.

Changed

  • Stop inference of dtypes if the :dtype option is given by the user.
    The main goal of this change is to improve performance. We are now delegating the job of decoding the terms as the given :dtype to the backend.

  • Explorer.Series.pow/2 no longer casts to float when the exponent is a signed integer. We are following the way Polars works now, which is to try to execute the operation or raise an exception in case the exponent is negative.

  • Explorer.Series.pivot_wider/4 no longer includes the names_from column name in the new columns when values_from is a list of columns. This is more consistent with its behaviour when values_from is a single column.

  • Explorer.Series.substring/3 no longer cycles to the end of the string if the negative offset surpasses the beginning of that string. In that case, an empty string is returned.

  • The Explorer.Series.ewm_* functions no longer replace nil values with the value at the previous index. They now propogate nil values through to the result series.

  • Saving a dataframe as a Parquet file to S3 services no longer works when streaming is enabled. This is temporary due to a bug in Polars. An exception should be raised instead.

Pull requests

New Contributors

Full Changelog: v0.8.3...v0.9.0

SHA256 of artifacts

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Contributors

josevalim, filmor, and 6 other contributors
Assets 15
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v0.8.3

10 Jun 20:18
@philss philss
v0.8.3
b3bee3b
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v0.8.3

Added

  • Add new data type for datetimes with timezones: {:datetime, precision, time_zone}
    The old dtype is now {:naive_datetime, precision}.

  • Add option to rechunk the dataframes when using Explorer.DataFrame.from_parquet/3

Changed

  • Change the {:datetime, precision} dtype to {:naive_datetime, precision}.
    The idea is to mirror Elixir's datetime, and introduce support for time zones.
    Please note: {:datetime, precision} will work as an alias for {:naive_datetime, precision} for now but will raise a warning.
    The alias will be removed in a future release.

  • Literal %NaiveDateTime{} structs used in expressions will now have :microsecond precision.
    Previously they defaulted to :nanosecond precision.
    This was incorrect because %NaiveDateTime{} structs only have :microsecond precision.

Fixed

  • Fix regression in Explorer.DataFrame.concat_rows/2.
    It's possible to concat dataframes that are not aligned again.

  • Fix "is_finite" and "is_infinite" from Series to work in the context of a Explorer.Query.

Pull requests

New Contributors

SHA256 of the artifacts

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Full Changelog: v0.8.2...v0.8.3

Contributors

mlineen, philss, and 2 other contributors
Assets 15
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v0.8.2

22 Apr 12:34
@philss philss
v0.8.2
990d4e5
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v0.8.2

Added

  • Add functions to work with strings and regexes.

    Some of the functions have the prefix "re_", because they accept a string that represents a regular expression.

    There is an important detail: we do not accept Elixir regexes, because we cannot guarantee that the backend supports it. Instead we accept a plain string that is "escaped". This means that you can use the ~S sigil to build that string.
    Example: ~S/(a|b)/.

    The added functions are the following:

    • Explorer.Series.split_into/3 - split a string series into a struct of string fields. This function accepts a string as a separator.

    • Explorer.Series.re_contains/2 - check is the string series matches the regex pattern. Like the "non regex" counterpart, it returns a boolean series.

    • Explorer.Series.re_replace/3 - replaces all occurences of a pattern with replacement in string series. The replacement can refer to groups captures by using the ${x}, where x is the group index (starts with 1) or name.

    • Explorer.Series.count_matches/2 - count how many times a substring appears in a string series.

    • Explorer.Series.re_count_matches/2 - count how many times a pattern matches in a string series.

    • Explorer.Series.re_scan/2 - scan for all matches for the given regex pattern.
      This is going to result in a series of lists of strings - {:list, :string}.

    • Explorer.Series.re_named_captures/2 - extract all capture groups as a struct for the given regex pattern. In case the groups are not named, their positions are used as names.

  • Enable the usage of system certificates if OTP version 25 or above.

  • Add support for the :streaming option in Explorer.DataFrame.to_csv/3.

  • Support operations with groups in the Lazy Polars backend. This change makes the lazy frame implementation more useful, by supporting the usage of groups in following functions:

    • Explorer.DataFrame.slice/3

    • Explorer.DataFrame.head/2

    • Explorer.DataFrame.tail/2

    • Explorer.DataFrame.filter_with/2 and the macro version of it, filter/2.

    • Explorer.DataFrame.sort_with/3, although it ignores "maintain order" and "nulls last" options when used with groups.

    • Explorer.DataFrame.mutate_with/2 and its macro version, mutate/2.

Changed

  • We now avoid raising an exception if a non existent column is used in Explorer.DataFrame.discard/2.

  • Make the dependency of cacerts optional. This is because people using Erlang/OTP 25 or above can use the certificates provided by the system.
    So you may need to add the dependency of cacerts if your OTP version is older than that.

  • Some precision differences in float operations may appear. This is due to an update in the Polars version to "v0.38.1". Polars is our default backend.

Fixed

  • Fix Explorer.Series.split/2 inside the context of Explorer.Query.

  • Add optional X-Amz-Security-Token header to S3 request. This is needed in case the user is passing down a token for authentication.

  • Fix Explorer.DataFrame.sort_by/3 with groups to respect :nils option.
    This is considering only the eager implementation.

  • Fix inspection of lazy frames in remote nodes.

Pull requests

  • Bump Polars 0.37 by @lkarthee in #861
  • DataFrame.discard/2 - don't raise for non existent column by @lkarthee in #872
  • Add native expression for Series.split/2 by @H12 in #875
  • Bump mio from 0.8.10 to 0.8.11 in /native/explorer by @dependabot in #876
  • Implements Series.split_into/3 by @ryancurtin in #873
  • Update Polars to v0.38 by @philss in #879
  • Add optional x-amz-security-token header to S3 request by @jschniper in #881
  • Rewrite LazyFrame by @philss in #882
  • Update Rustler to v0.32.1 by @philss in #884
  • Fix DF.sort_by/3 with groups to respect :nils option by @philss in #886
  • Update Polars to v0.38.3 by @philss in #887
  • Implements :streaming option for DataFrame.to_csv/3 by @ryancurtin in #889
  • Support operations with groups in the Lazy Polars backend by @philss in #890
  • Bump h2 from 0.3.25 to 0.3.26 in /native/explorer by @dependabot in #891
  • Revert LazyFrame implementation with stack by @philss in #892
  • Refactor eager DF implementation to make use of lazy backend by @philss in #893
  • Add re_contains/2 and re_replace/3 to match with a regex by @philss in #894
  • Add count_matches/2, re_count_matches/2, re_scan/2 and re_named_captures/2 to Series by @philss in #895
  • Add changes to the change log for the upcoming version by @philss in #897
  • Update dependencies by @philss in #899
  • Pass down backend to lazy series and enable re_named_captures/2 usage by @philss in #896
  • Release v0.8.2 by @philss in #900

New Contributors

SHA 256 of Artifacts

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Full Changelog: v0.8.1...v0.8.2

Contributors

philss, ryancurtin, and 4 other contributors
Assets 15
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v0.8.1

24 Feb 21:29
@philss philss
v0.8.1
bfdf07b
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v0.8.1

Added

  • Add Explorer.Series.field/2 to extract a field from a struct series.
    It returns a new series with the field's dtype.

  • Add Explorer.Series.json_decode/2 that can decode a string series containing valid JSON objects according to dtype.

  • Add eager count/1 and lazy size/1 to Explorer.Series.

  • Add support for maps as expressions inside Explorer.Query. They are "converted" to structs.

  • Add json_path_match/2 to extract a string series from a string containing valid JSON objects.
    See the article JSONPath - XPath for JSON for details about JSON paths.

  • Add Explorer.Series.row_index/1 to retrieve the index of rows starting from 0.

  • Add support for passing the :on column directly (instead of inside a list) in Explorer.DataFrame.join/3.

Changed

  • Remove some deprecated functions from documentation.

  • Change internal representation of the :struct dtype to use list of tuples instead of a map to represent the dtypes of each field. This shouldn't break because we normalise maps to lists when a struct dtype is passed in from_list/2 or cast/2.

  • Update Rustler minimum version to ~> 0.31. Since Rustler is optional, this shouldn't affect most of the users.

Fixed

  • Fix float overflow error to avoid crashing the VM, and instead it returns an argument error.

  • Fix Explorer.DataFrame.print/2 for when the DF contains structs.

Pull requests

New Contributors

Full Changelog: v0.8.0...v0.8.1
Official Changelog: https://hexdocs.pm/explorer/changelog.html

SHA256 of precompiled artifacts

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Contributors

filmor, ahamez, and 5 other contributors
Assets 15
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v0.8.0

20 Jan 17:43
@philss philss
v0.8.0
e0e242b
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v0.8.0

Added

  • Add explode/2 to Explorer.DataFrame. This function is useful to expand the contents of a {:list, inner_dtype} series into a "inner_dtype" series.

  • Add the new series functions all?/1 and any?/1, to work with boolean series.

  • Add support for the "struct" dtype. This new dtype represents the struct dtype from Polars/Arrow.

  • Add map/2 and map_with/2 to the Explorer.Series module.
    This change enables the usage of the Explore.Query features in a series.

  • Add sort_by/2 and sort_with/2 to the Explorer.Series module.
    This change enables the usage of the lazy computations and the Explorer.Query module.

  • Add unnest/2 to Explorer.DataFrame. It works by taking the fields of a "struct" - the new dtype - and transform them into columns.

  • Add pairwise correlation - Explorer.DataFrame.correlation/2 - to calculate the correlation between numeric columns inside a data frame.

  • Add pairwise covariance - Explorer.DataFrame.covariance/2 - to calculate the covariance between numeric columns inside a data frame.

  • Add support for more integer dtypes. This change introduces new signed and unsigned integer dtypes:

    • {:s, 8}, {:s, 16}, {:s, 32}
    • {:u, 8}, {:u, 16}, {:u, 32}, {:u, 64}.

    The existing :integer dtype is now represented as {:s, 64}, and it's still the default dtype for integers. But series and data frames can now work with the new dtypes. Short names for these new dtypes can be used in functions like Explorer.Series.from_list/2. For example, {:u, 32} can be represented with the atom :u32.

    This may bring more interoperability with Nx, and with Arrow related things, like ADBC and Parquet.

  • Add ewm_standard_deviation/2 and ewm_variance/2 to Explorer.Series.
    They calculate the "exponentially weighted moving" variance and standard deviation.

  • Add support for :skip_rows_after_header option for the CSV reader functions.

  • Support {:list, numeric_dtype} for Explorer.Series.frequencies/1.

  • Support pins in cond, inside the context of Explorer.Query.

  • Introduce the :null dtype. This is a special dtype from Polars and Apache Arrow to represent "all null" series.

  • Add Explorer.DataFrame.transpose/2 to transpose a data frame.

Changed

  • Rename the functions related to sorting/arranging of the Explorer.DataFrame.
    Now arrange_with is named sort_with, and arrange is sort_by.

    The sort_by/3 is a macro and it is going to work using the Explorer.Query module. On the other side, the sort_with/2 uses a callback function.

  • Remove unnecessary casts to {:s, 64} now that we support more integer dtypes.
    It affects some functions, like the following in the Explorer.Series module:

    • argsort
    • count
    • rank
    • day_of_week, day_of_year, week_of_year, month, year, hour, minute, second
    • abs
    • clip
    • lengths
    • slice
    • n_distinct
    • frequencies

    And also some functions from the Explorer.DataFrame module:

    • mutate - mostly because of series changes
    • summarise - mostly because of series changes
    • slice

Fixed

  • Fix inspection of series and data frames between nodes.

  • Fix cast of :string series to {:datetime, any()}

  • Fix mismatched types in Explorer.Series.pow/2, making it more consistent.

  • Normalize sorting options.

  • Fix functions with dtype mismatching the result from Polars.
    This fix is affecting the following functions:

    • quantile/2 in the context of a lazy series
    • mode/1 inside a summarisation
    • strftime/2 in the context of a lazy series
    • mutate_with/2 when creating a column from a NaiveDateTime or Explorer.Duration.

Pull requests

New Contributors

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Contributors

JonGretar, kellyfelkins, and 9 other contributors
Assets 15
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v0.7.2

30 Nov 20:21
@github-actions github-actions
v0.7.2
e585012
This commit was signed with the committer’s verified signature.
philss Philip Sampaio
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v0.7.2

Added

  • Add the functions day_of_year/1 and week_of_year/1 to Explorer.Series.

  • Add filter/2 - a macro -, and filter_with/2 to Explorer.Series.

    This change enables the usage of queries - using Explorer.Query - when
    filtering a series. The main difference is that series does not have a
    name when used outside a dataframe. So to refer to itself inside the
    query, we can use the special _ variable.

      iex> s = Explorer.Series.from_list([1, 2, 3])
  iex> Explorer.Series.filter(s, _ > 2)
  #Explorer.Series<
    Polars[1]
    integer [3]
  >

  • Add support for the {:list, any()} dtype, where any() can be any other
    valid dtype. This is a recursive dtype, that can represent nested lists.
    It's useful to group data together in the same series.

  • Add Explorer.Series.mode/2 to get the most common value(s) of the series.

  • Add split/2 and join/2 to the Explorer.Series module.
    These functions are useful to split string series into {:list, :string},
    or to join parts of a {:list, :string} and return a :string series.

  • Expose ddof option for variance, covariance and standard deviation.

  • Add a new {:f, 32} dtype to represent 32 bits float series.
    It's also possible to use the atom :f32 to create this type of series.
    The atom :f64 can be used as an alias for {:f, 64}, just like the
    :float atom.

  • Add lengths/1 and member?/2 to Explorer.Series.
    These functions work with {:list, any()}, where any() is any valid dtype.
    The idea is to count the members of a "list" series, and check if a given
    value is member of a list series, respectively.

  • Add support for streaming parquet files from a lazy dataframe to AWS S3
    compatible services.

Changed

  • Remove restriction on pivot_wider dtypes.
    In the early days, Polars only supported numeric dtypes for the "first"
    aggregation. This is not true anymore, and we can lift this restriction.

  • Change :float dtype to be represented as {:f, 64}. It's still possible
    to use the atom :float to create float series, but now Explorer.Series.dtype/1
    returns {:f, 64} for float 64 bits series.

Fixed

  • Add missing implementation of Explorer.Series.replace/3 for lazy series.

  • Fix inspection of DFs and series when limit: :infinity is used.

Removed

  • Drop support for the riscv64gc-unknown-linux-gnu target.

    We decided to stop precompiling to this target because it's been hard to maintain it.
    Ideally we should support it again in the future.

Pull requests

New Contributors

Full Changelog: v0.7.1...v0.7.2
Official Changelog: https://github.com/elixir-explorer/explorer/blob/main/CHANGELOG.md

Checksums

The list below if the SHA256 checksums of the precompiled artifacts.

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ad3779850c36bf0ff3ca568124da8966cca25ce84912642dc13462cb9ca5a9dd  libexplorer-v0.7.2-nif-2.15-x86_64-unknown-linux-musl.so.tar.gz

Contributors

rodrigues, maennchen, and 5 other contributors
Assets 15
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