Function Example_stackedAreaChart

plotutil/main.go:126–168

An example of making a stacked area chart.

()

// An example of making a stacked area chart.
func Example_stackedAreaChart() *plot.Plot {
	p := plot.New()

	p.Title.Text = "Example: Software Version Comparison"
	p.X.Label.Text = "Date"
	p.Y.Label.Text = "Users (in thousands)"

	p.Legend.Top = true
	p.Legend.Left = true

	vals := []plotter.Values{
		{0.02, 0.015, 0, 0, 0, 0, 0},
		{0, 0.48, 0.36, 0.34, 0.32, 0.32, 0.28},
		{0, 0, 0.87, 1.4, 0.64, 0.32, 0.28},
		{0, 0, 0, 1.26, 0.34, 0.12, 0.09},
		{0, 0, 0, 0, 2.48, 2.68, 2.13},
		{0, 0, 0, 0, 0, 1.32, 0.54},
		{0, 0, 0, 0, 0, 0.68, 5.67},
	}

	err := plotutil.AddStackedAreaPlots(p, plotter.Values{2007, 2008, 2009, 2010, 2011, 2012, 2013},
		"Version 3.0",
		stackValues{vs: vals[0:7]},
		"Version 2.1",
		stackValues{vs: vals[0:6]},
		"Version 2.0.1",
		stackValues{vs: vals[0:5]},
		"Version 2.0",
		stackValues{vs: vals[0:4]},
		"Version 1.1",
		stackValues{vs: vals[0:3]},
		"Version 1.0",
		stackValues{vs: vals[0:2]},
		"Beta",
		stackValues{vs: vals[0:1]},
	)

	if err != nil {
		panic(err)
	}

	return p
}