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main.go
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main.go
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package main
//go:generate go run main.go
import (
"fmt"
"os"
"github.com/ebudan/go-chart/v2"
)
func main() {
/*
In this example we use a custom `ValueFormatter` for the y axis, letting us specify how to format text of the y-axis ticks.
You can also do this for the x-axis, or the secondary y-axis.
This example also shows what the chart looks like with the x-axis left off or not shown.
*/
graph := chart.Chart{
YAxis: chart.YAxis{
ValueFormatter: func(v interface{}) string {
if vf, isFloat := v.(float64); isFloat {
return fmt.Sprintf("%0.6f", vf)
}
return ""
},
},
Series: []chart.Series{
chart.ContinuousSeries{
XValues: []float64{1.0, 2.0, 3.0, 4.0, 5.0},
YValues: []float64{1.0, 2.0, 3.0, 4.0, 5.0},
},
},
}
f, _ := os.Create("output.png")
defer f.Close()
graph.Render(chart.PNG, f)
}