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// Copyright ©2018 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 plotter_test
import (
"image/color"
"log"
"golang.org/x/exp/rand"
"gonum.org/v1/plot"
"gonum.org/v1/plot/plotter"
)
func ExampleLine_filledLine() {
rnd := rand.New(rand.NewSource(1))
// randomPoints returns some random x, y points
// with some interesting kind of trend.
randomPoints := func(n int, x float64) plotter.XYs {
pts := make(plotter.XYs, n)
for i := range pts {
if i == 0 {
pts[i].X = x + rnd.Float64()
} else {
pts[i].X = pts[i-1].X + 0.5 + rnd.Float64()
}
pts[i].Y = -5. + 10*rnd.Float64()
}
return pts
}
p, err := plot.New()
if err != nil {
log.Panic(err)
}
p.Title.Text = "Filled Line Example"
p.X.Label.Text = "X"
p.Y.Label.Text = "Y"
p.Add(plotter.NewGrid())
filled, err := plotter.NewLine(randomPoints(4, 0))
if err != nil {
log.Panic(err)
}
filled.FillColor = color.RGBA{R: 196, G: 255, B: 196, A: 255}
p.Add(filled)
err = p.Save(200, 200, "testdata/filledLine.png")
if err != nil {
log.Panic(err)
}
}
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