X.1 Go语言使用第三方图表库(Gonum)辅助科学计算

package main

import (

  "gonum.org/v1/plot"

  "gonum.org/v1/plot/plotter"

  "gonum.org/v1/plot/plotutil"

  "gonum.org/v1/plot/vg"

)

func main() {

  p, _ := plot.New()

  p.Title.Text = "Gonum plot示例"

  p.X.Label.Text = "X"

  p.Y.Label.Text = "Y"

  points := make(plotter.XYs, 4)

  points[0].X = 0.0

  points[0].Y = 0.0

  points[1].X = 1.0

  points[1].Y = 1.0

  points[2].X = 2.0

  points[2].Y = 4.0

  points[3].X = 3.0

  points[3].Y = 9.0

  plotutil.AddLinePoints(p,"y = x * x", points)

  p.Save(4*vg.Inch, 4*vg.Inch, "points.png")

}