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// Copyright ©2016 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.
package moreland_test
/*
import (
"log"
"math"
"os"
"testing"
"gonum.org/v1/gonum/mat"
"gonum.org/v1/plot"
"gonum.org/v1/plot/cmpimg"
"gonum.org/v1/plot/palette"
"gonum.org/v1/plot/palette/moreland"
"gonum.org/v1/plot/plotter"
"gonum.org/v1/plot/vg"
"gonum.org/v1/plot/vg/draw"
"gonum.org/v1/plot/vg/vgimg"
)
type offsetUnitGrid struct {
XOffset, YOffset float64
Data *mat.Dense
}
func (g offsetUnitGrid) Dims() (c, r int) { r, c = g.Data.Dims(); return c, r }
func (g offsetUnitGrid) Z(c, r int) float64 { return g.Data.At(r, c) }
func (g offsetUnitGrid) X(c int) float64 {
_, n := g.Data.Dims()
if c < 0 || n <= c {
panic("index out of range")
}
return float64(c) + g.XOffset
}
func (g offsetUnitGrid) Y(r int) float64 {
m, _ := g.Data.Dims()
if r < 0 || m <= r {
panic("index out of range")
}
return float64(r) + g.YOffset
}
// This Example gives examples of plots using the palettes in this package.
// The output can be found at
// https://github.com/gonum/plot/blob/master/palette/moreland/testdata/moreland_golden.png.
func Example() {
m := offsetUnitGrid{
XOffset: -50,
YOffset: -50,
Data: mat.NewDense(100, 100, nil),
}
for i := 0; i < 100; i++ {
for j := 0; j < 100; j++ {
x := float64(i-50) / 10
y := float64(j-50) / 10
v := math.Sin(x*x+y*y) / (x*x + y*y)
m.Data.Set(i, j, v)
}
}
const (
rows = 3
cols = 3
)
c := vgimg.New(vg.Points(800), vg.Points(800))
dc := draw.New(c)
tiles := draw.Tiles{
Rows: rows,
Cols: cols,
}
type paletteHolder struct {
name string
cmap palette.Palette
}
palettes := []paletteHolder{
{
name: "SmoothBlueRed",
cmap: moreland.SmoothBlueRed().Palette(255),
},
{
name: "SmoothBlueTan",
cmap: moreland.SmoothBlueTan().Palette(255),
},
{
name: "SmoothGreenPurple",
cmap: moreland.SmoothGreenPurple().Palette(255),
},
{
name: "SmoothGreenRed",
cmap: moreland.SmoothGreenRed().Palette(255),
},
{
name: "SmoothPurpleOrange",
cmap: moreland.SmoothPurpleOrange().Palette(255),
},
{
name: "BlackBody",
cmap: moreland.BlackBody().Palette(255),
},
{
name: "ExtendedBlackBody",
cmap: moreland.ExtendedBlackBody().Palette(255),
},
{
name: "Kindlmann",
cmap: moreland.Kindlmann().Palette(255),
},
{
name: "ExtendedKindlmann",
cmap: moreland.ExtendedKindlmann().Palette(255),
},
}
for i, plte := range palettes {
h := plotter.NewHeatMap(m, plte.cmap)
p, err := plot.New()
if err != nil {
log.Panic(err)
}
p.Title.Text = plte.name
p.Add(h)
p.X.Padding = 0
p.Y.Padding = 0
p.Draw(tiles.At(dc, i%cols, i/cols))
}
pngimg := vgimg.PngCanvas{Canvas: c}
f, err := os.Create("testdata/moreland.png")
if err != nil {
log.Panic(err)
}
if _, err = pngimg.WriteTo(f); err != nil {
log.Panic(err)
}
}
func TestHeatMap(t *testing.T) {
cmpimg.CheckPlot(Example, t, "moreland.png")
}
*/
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