Adding upstream version 2.1.2.

Signed-off-by: Daniel Baumann <daniel@debian.org>

examples/min_max/main.go

@@ -0,0 +1,61 @@
+package main
+
+//go:generate go run main.go
+
+import (
+	"os"
+
+	"github.com/wcharczuk/go-chart/v2"
+)
+
+func main() {
+	mainSeries := chart.ContinuousSeries{
+		Name:    "A test series",
+		XValues: chart.Seq{Sequence: chart.NewLinearSequence().WithStart(1.0).WithEnd(100.0)}.Values(),
+		YValues: chart.Seq{Sequence: chart.NewRandomSequence().WithLen(100).WithMin(50).WithMax(150)}.Values(),
+	}
+
+	minSeries := &chart.MinSeries{
+		Style: chart.Style{
+			StrokeColor:     chart.ColorAlternateGray,
+			StrokeDashArray: []float64{5.0, 5.0},
+		},
+		InnerSeries: mainSeries,
+	}
+
+	maxSeries := &chart.MaxSeries{
+		Style: chart.Style{
+			StrokeColor:     chart.ColorAlternateGray,
+			StrokeDashArray: []float64{5.0, 5.0},
+		},
+		InnerSeries: mainSeries,
+	}
+
+	graph := chart.Chart{
+		Width:  1920,
+		Height: 1080,
+		YAxis: chart.YAxis{
+			Name: "Random Values",
+			Range: &chart.ContinuousRange{
+				Min: 25,
+				Max: 175,
+			},
+		},
+		XAxis: chart.XAxis{
+			Name: "Random Other Values",
+		},
+		Series: []chart.Series{
+			mainSeries,
+			minSeries,
+			maxSeries,
+			chart.LastValueAnnotationSeries(minSeries),
+			chart.LastValueAnnotationSeries(maxSeries),
+		},
+	}
+
+	graph.Elements = []chart.Renderable{chart.Legend(&graph)}
+
+	f, _ := os.Create("output.png")
+	defer f.Close()
+	graph.Render(chart.PNG, f)
+}