Function AddLines

plotutil/add.go:183–226

AddLines adds Line plotters to a plot. The variadic arguments must be a string or one of a plotting type, plotter.XYers or *plotter.Function. Each plotting type is added to the plot using the next color and dashes shape via the Color and Dashes functions. If a plotting type is immediately preceeded

(plt *plot.Plot, vs ...any)

// If an error occurs then none of the plotters are added
// to the plot, and the error is returned.
func AddLines(plt *plot.Plot, vs ...any) error {
	var ps []plot.Plotter
	var items []item
	name := ""
	var i int
	for _, v := range vs {
		switch t := v.(type) {
		case string:
			name = t

		case plotter.XYer:
			l, err := plotter.NewLine(t)
			if err != nil {
				return err
			}
			l.Color = Color(i)
			l.Dashes = Dashes(i)
			i++
			ps = append(ps, l)
			if name != "" {
				items = append(items, item{name: name, value: l})
				name = ""
			}

		case *plotter.Function:
			t.Color = Color(i)
			t.Dashes = Dashes(i)
			i++
			ps = append(ps, t)
			if name != "" {
				items = append(items, item{name: name, value: t})
				name = ""
			}

		default:
			panic(fmt.Sprintf("plotutil: AddLines handles strings, plotter.XYers and *plotter.Function, got %T", t))
		}
	}
	plt.Add(ps...)
	for _, v := range items {
		plt.Legend.Add(v.name, v.value)
	}
	return nil
}

// AddLinePoints adds Line and Scatter plotters to a
// plot.  The variadic arguments must be either strings