func PlotLine(pts, pts2 plotter.XYs, w []float64, b float64, path string) {
p, err := plot.New()
if err != nil {
panic(err)
}
p.X.Label.Text = "x"
p.Y.Label.Text = "y"
x := []float64{}
y := []float64{}
for i := range make([]float64, 150) {
bx := float64(i)*0.1 - 6.0
x = append(x, bx)
y = append(y, -b/w[1]-w[0]/w[1]*bx)
}
pts_res := makeLine(x, y)
err = plotutil.AddScatters(p,
"Class 0", pts,
"Class 1", pts2,
)
if err != nil {
panic(err)
}
err = plotutil.AddLines(p,
"Line", pts_res,
)
if err != nil {
panic(err)
}
if err := p.Save(10*vg.Inch, 10*vg.Inch, path); err != nil {
panic(err)
}
}
func PlotSample(pts, pts2 plotter.XYs, path string) {
p, err := plot.New()
if err != nil {
panic(err)
}
p.X.Label.Text = "x"
p.Y.Label.Text = "y"
err = plotutil.AddScatters(p,
"Class 0", pts,
"Class 1", pts2,
)
if err != nil {
panic(err)
}
if err := p.Save(10*vg.Inch, 10*vg.Inch, path); err != nil {
panic(err)
}
}
func PlotError(errors []float64, path string) {
p, err := plot.New()
if err != nil {
panic(err)
}
p.X.Label.Text = "iteration"
p.Y.Label.Text = "error"
pts_err := makePoints(errors)
err = plotutil.AddScatters(p,
"Error", pts_err,
)
if err != nil {
panic(err)
}
if err := p.Save(10*vg.Inch, 10*vg.Inch, path); 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
}