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// 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.
// +build ignore
package main
import (
"golang.org/x/exp/rand"
"gonum.org/v1/plot"
"gonum.org/v1/plot/plotter"
"gonum.org/v1/plot/plotutil"
)
var examples = []struct {
name string
mkplot func() *plot.Plot
}{
{"example_errpoints", Example_errpoints},
{"example_stackedAreaChart", Example_stackedAreaChart},
}
func main() {
for _, ex := range examples {
drawEps(ex.name, ex.mkplot)
drawSvg(ex.name, ex.mkplot)
drawPng(ex.name, ex.mkplot)
drawTiff(ex.name, ex.mkplot)
drawJpg(ex.name, ex.mkplot)
drawPdf(ex.name, ex.mkplot)
}
}
func drawEps(name string, mkplot func() *plot.Plot) {
if err := mkplot().Save(4, 4, name+".eps"); err != nil {
panic(err)
}
}
func drawPdf(name string, mkplot func() *plot.Plot) {
if err := mkplot().Save(4, 4, name+".pdf"); err != nil {
panic(err)
}
}
func drawSvg(name string, mkplot func() *plot.Plot) {
if err := mkplot().Save(4, 4, name+".svg"); err != nil {
panic(err)
}
}
func drawPng(name string, mkplot func() *plot.Plot) {
if err := mkplot().Save(4, 4, name+".png"); err != nil {
panic(err)
}
}
func drawTiff(name string, mkplot func() *plot.Plot) {
if err := mkplot().Save(4, 4, name+".tiff"); err != nil {
panic(err)
}
}
func drawJpg(name string, mkplot func() *plot.Plot) {
if err := mkplot().Save(4, 4, name+".jpg"); err != nil {
panic(err)
}
}
// Example_errpoints draws some error points.
func Example_errpoints() *plot.Plot {
rnd := rand.New(rand.NewSource(1))
// Get some random data.
n, m := 5, 10
pts := make([]plotter.XYer, n)
for i := range pts {
xys := make(plotter.XYs, m)
pts[i] = xys
center := float64(i)
for j := range xys {
xys[j].X = center + (rnd.Float64() - 0.5)
xys[j].Y = center + (rnd.Float64() - 0.5)
}
}
plt, err := plot.New()
if err != nil {
panic(err)
}
mean95, err := plotutil.NewErrorPoints(plotutil.MeanAndConf95, pts...)
if err != nil {
panic(err)
}
medMinMax, err := plotutil.NewErrorPoints(plotutil.MedianAndMinMax, pts...)
if err != nil {
panic(err)
}
plotutil.AddLinePoints(plt,
"mean and 95% confidence", mean95,
"median and minimum and maximum", medMinMax)
if err := plotutil.AddErrorBars(plt, mean95, medMinMax); err != nil {
panic(err)
}
if err := plotutil.AddScatters(plt, pts[0], pts[1], pts[2], pts[3], pts[4]); err != nil {
panic(err)
}
return plt
}
type stackValues struct{ vs []plotter.Values }
func (n stackValues) Len() int { return n.vs[0].Len() }
func (n stackValues) Value(i int) float64 {
sum := 0.0
for _, v := range n.vs {
sum += v.Value(i)
}
return sum
}
// An example of making a stacked area chart.
func Example_stackedAreaChart() *plot.Plot {
p, err := plot.New()
if err != nil {
panic(err)
}
p.Title.Text = "Example: Software Version Comparison"
p.X.Label.Text = "Date"
p.Y.Label.Text = "Users (in thousands)"
p.Legend.Top = true
p.Legend.Left = true
vals := []plotter.Values{
{0.02, 0.015, 0, 0, 0, 0, 0},
{0, 0.48, 0.36, 0.34, 0.32, 0.32, 0.28},
{0, 0, 0.87, 1.4, 0.64, 0.32, 0.28},
{0, 0, 0, 1.26, 0.34, 0.12, 0.09},
{0, 0, 0, 0, 2.48, 2.68, 2.13},
{0, 0, 0, 0, 0, 1.32, 0.54},
{0, 0, 0, 0, 0, 0.68, 5.67},
}
err = plotutil.AddStackedAreaPlots(p, plotter.Values{2007, 2008, 2009, 2010, 2011, 2012, 2013},
"Version 3.0",
stackValues{vs: vals[0:7]},
"Version 2.1",
stackValues{vs: vals[0:6]},
"Version 2.0.1",
stackValues{vs: vals[0:5]},
"Version 2.0",
stackValues{vs: vals[0:4]},
"Version 1.1",
stackValues{vs: vals[0:3]},
"Version 1.0",
stackValues{vs: vals[0:2]},
"Beta",
stackValues{vs: vals[0:1]},
)
if err != nil {
panic(err)
}
return p
}
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