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plotter: incorporate volcano example into package tests
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,100 +1,19 @@ | ||
| #!/usr/bin/env bash | ||
|
|
||
| cat >volcano_example.go <<EOF | ||
| // Generated code do not edit. Run \`go generate volcano_example.go\`. | ||
| cat >volcano_data_test.go <<EOF | ||
| // Generated code do not edit. Run \`go generate gonum.org/v1/plot/plotter\`. | ||
| // Copyright ©2015 The gonum Authors. All rights reserved. | ||
| // Copyright ©2015 The Gonum Authors. All rights reserved. | ||
| // Use of this source code is governed by a BSD-style | ||
| // license that can be found in the LICENSE file. | ||
| //go:generate ./volcano | ||
| package plotter_test | ||
| //+build ignore | ||
| package main | ||
| import ( | ||
| "image/color" | ||
| "gonum.org/v1/gonum/mat" | ||
| "gonum.org/v1/plot" | ||
| "gonum.org/v1/plot/palette" | ||
| "gonum.org/v1/plot/plotter" | ||
| "gonum.org/v1/plot/vg" | ||
| "gonum.org/v1/plot/vg/draw" | ||
| ) | ||
| type deciGrid struct{ mat.Matrix } | ||
| func (g deciGrid) Dims() (c, r int) { r, c = g.Matrix.Dims(); return c, r } | ||
| func (g deciGrid) Z(c, r int) float64 { return g.Matrix.At(r, c) } | ||
| func (g deciGrid) X(c int) float64 { | ||
| _, n := g.Matrix.Dims() | ||
| if c < 0 || c >= n { | ||
| panic("index out of range") | ||
| } | ||
| return 10 * float64(c) | ||
| } | ||
| func (g deciGrid) Y(r int) float64 { | ||
| m, _ := g.Matrix.Dims() | ||
| if r < 0 || r >= m { | ||
| panic("index out of range") | ||
| } | ||
| return 10 * float64(r) | ||
| } | ||
| func main() { | ||
| var levels []float64 | ||
| for l := 100.5; l < volcano.Matrix.(*mat64.Dense).Max(); l += 5 { | ||
| levels = append(levels, l) | ||
| } | ||
| c := plotter.NewContour(volcano, levels, palette.Rainbow(len(levels), (palette.Yellow+palette.Red)/2, palette.Blue, 1, 1, 1)) | ||
| quarterStyle := draw.LineStyle{ | ||
| Color: color.Black, | ||
| Width: vg.Points(0.5), | ||
| Dashes: []vg.Length{0.2, 0.4}, | ||
| } | ||
| halfStyle := draw.LineStyle{ | ||
| Color: color.Black, | ||
| Width: vg.Points(0.5), | ||
| Dashes: []vg.Length{5, 2, 1, 2}, | ||
| } | ||
| c.LineStyles = append(c.LineStyles, quarterStyle, halfStyle, quarterStyle) | ||
| h := plotter.NewHeatMap(volcano, palette.Heat(len(levels)*2, 1)) | ||
| p, err := plot.New() | ||
| if err != nil { | ||
| panic(err) | ||
| } | ||
| p.Title.Text = "Maunga Whau Volcano" | ||
| p.Add(h) | ||
| p.Add(c) | ||
| p.X.Padding = 0 | ||
| p.Y.Padding = 0 | ||
| _, p.X.Max, _, p.Y.Max = h.DataRange() | ||
| name := "example_volcano" | ||
| for _, ext := range []string{ | ||
| ".eps", | ||
| ".pdf", | ||
| ".svg", | ||
| ".png", | ||
| ".tiff", | ||
| ".jpg", | ||
| } { | ||
| if err := p.Save(4, 4, name+ext); err != nil { | ||
| panic(err) | ||
| } | ||
| } | ||
| } | ||
| import "gonum.org/v1/gonum/mat" | ||
| // Data extracted from RDatasets volcano data for the Maunga Whau volcano topographic data. | ||
| var volcano = deciGrid{mat64.NewDense(87, 61, []float64{ | ||
| var volcano = deciGrid{mat.NewDense(87, 61, []float64{ | ||
| EOF | ||
| R -q -e 'write.table(as.data.frame(volcano), file="volcano_example.go", sep=", ", eol=",\n", col.names=FALSE, row.names=FALSE, append=TRUE)' | ||
| echo >> volcano_example.go '})}' | ||
| go fmt volcano_example.go | ||
| R -q -e 'write.table(as.data.frame(volcano), file="volcano_data_test.go", sep=", ", eol=",\n", col.names=FALSE, row.names=FALSE, append=TRUE)' | ||
| echo >> volcano_data_test.go '})}' | ||
| go fmt volcano_data_test.go |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,75 @@ | ||
| // Copyright ©2015 The Gonum Authors. All rights reserved. | ||
| // Use of this source code is governed by a BSD-style | ||
| // license that can be found in the LICENSE file. | ||
|
|
||
| //go:generate ./volcano | ||
|
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| package plotter_test | ||
|
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| import ( | ||
| "image/color" | ||
|
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| "gonum.org/v1/gonum/mat" | ||
| "gonum.org/v1/plot" | ||
| "gonum.org/v1/plot/palette" | ||
| "gonum.org/v1/plot/plotter" | ||
| "gonum.org/v1/plot/vg" | ||
| "gonum.org/v1/plot/vg/draw" | ||
| ) | ||
|
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| type deciGrid struct{ mat.Matrix } | ||
|
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| func (g deciGrid) Dims() (c, r int) { r, c = g.Matrix.Dims(); return c, r } | ||
| func (g deciGrid) Z(c, r int) float64 { return g.Matrix.At(r, c) } | ||
| func (g deciGrid) X(c int) float64 { | ||
| _, n := g.Matrix.Dims() | ||
| if c < 0 || c >= n { | ||
| panic("index out of range") | ||
| } | ||
| return 10 * float64(c) | ||
| } | ||
| func (g deciGrid) Y(r int) float64 { | ||
| m, _ := g.Matrix.Dims() | ||
| if r < 0 || r >= m { | ||
| panic("index out of range") | ||
| } | ||
| return 10 * float64(r) | ||
| } | ||
|
|
||
| func Example_volcano() { | ||
| var levels []float64 | ||
| for l := 100.5; l < mat.Max(volcano.Matrix.(*mat.Dense)); l += 5 { | ||
| levels = append(levels, l) | ||
| } | ||
| c := plotter.NewContour(volcano, levels, palette.Rainbow(len(levels), (palette.Yellow+palette.Red)/2, palette.Blue, 1, 1, 1)) | ||
| quarterStyle := draw.LineStyle{ | ||
| Color: color.Black, | ||
| Width: vg.Points(0.5), | ||
| Dashes: []vg.Length{0.2, 0.4}, | ||
| } | ||
| halfStyle := draw.LineStyle{ | ||
| Color: color.Black, | ||
| Width: vg.Points(0.5), | ||
| Dashes: []vg.Length{5, 2, 1, 2}, | ||
| } | ||
| c.LineStyles = append(c.LineStyles, quarterStyle, halfStyle, quarterStyle) | ||
|
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| h := plotter.NewHeatMap(volcano, palette.Heat(len(levels)*2, 1)) | ||
|
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| p, err := plot.New() | ||
| if err != nil { | ||
| panic(err) | ||
| } | ||
| p.Title.Text = "Maunga Whau Volcano" | ||
|
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| p.Add(h) | ||
| p.Add(c) | ||
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| p.X.Padding = 0 | ||
| p.Y.Padding = 0 | ||
| _, p.X.Max, _, p.Y.Max = h.DataRange() | ||
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| if err := p.Save(10*vg.Centimeter, 10*vg.Centimeter, "testdata/volcano.png"); err != nil { | ||
| panic(err) | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,15 @@ | ||
| // Copyright ©2020 The Gonum Authors. All rights reserved. | ||
| // Use of this source code is governed by a BSD-style | ||
| // license that can be found in the LICENSE file. | ||
|
|
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| package plotter_test | ||
|
|
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| import ( | ||
| "testing" | ||
|
|
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| "gonum.org/v1/plot/cmpimg" | ||
| ) | ||
|
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| func TestVolcano(t *testing.T) { | ||
| cmpimg.CheckPlot(Example_volcano, t, "volcano.png") | ||
| } |