func main() {
rand.Seed(0) // The default random seed is 1.
p, err := plot.New()
if err != nil {
panic(err)
}
p.Title.Text = "Plotutil example"
p.X.Label.Text = "X"
p.Y.Label.Text = "Y"
err = plotutil.AddLinePoints(
p,
"First", randomPoints(15),
)
if err != nil {
panic(err)
}
cnvs, err := vgx11.New(4*96, 4*96, "Example")
if err != nil {
panic(err)
}
p.Draw(draw.New(cnvs))
cnvs.Paint()
time.Sleep(5 * time.Second)
err = plotutil.AddLinePoints(
p,
"Second", randomPoints(15),
"Third", randomPoints(15),
)
if err != nil {
panic(err)
}
p.Draw(draw.New(cnvs))
cnvs.Paint()
time.Sleep(10 * time.Second)
// Save the plot to a PNG file.
// if err := p.Save(4, 4, "points.png"); err != nil {
// panic(err)
// }
}
// Example_errpoints draws some error points.
func Example_errpoints() *plot.Plot {
// 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 + (rand.Float64() - 0.5)
xys[j].Y = center + (rand.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
}