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main.go
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main.go
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package main
import (
"fmt"
"os"
"path/filepath"
"github.com/vicanso/go-charts/v2"
)
func writeFile(buf []byte) error {
tmpPath := "./tmp"
err := os.MkdirAll(tmpPath, 0700)
if err != nil {
return err
}
file := filepath.Join(tmpPath, "line-chart.png")
err = os.WriteFile(file, buf, 0600)
if err != nil {
return err
}
return nil
}
func main() {
values := [][]float64{
{
120,
132,
101,
// 134,
charts.GetNullValue(),
90,
230,
210,
},
{
220,
182,
191,
234,
290,
330,
310,
},
{
150,
232,
201,
154,
190,
330,
410,
},
{
320,
332,
301,
334,
390,
330,
320,
},
{
820,
932,
901,
934,
1290,
1330,
1320,
},
}
p, err := charts.LineRender(
values,
charts.TitleTextOptionFunc("Line"),
charts.XAxisDataOptionFunc([]string{
"Mon",
"Tue",
"Wed",
"Thu",
"Fri",
"Sat",
"Sun",
}),
charts.LegendLabelsOptionFunc([]string{
"Email",
"Union Ads",
"Video Ads",
"Direct",
"Search Engine",
}, "50"),
func(opt *charts.ChartOption) {
opt.Legend.Padding = charts.Box{
Top: 5,
Bottom: 10,
}
opt.YAxisOptions = []charts.YAxisOption{
{
SplitLineShow: charts.FalseFlag(),
},
}
opt.SymbolShow = charts.FalseFlag()
opt.LineStrokeWidth = 1
opt.ValueFormatter = func(f float64) string {
return fmt.Sprintf("%.0f", f)
}
},
)
if err != nil {
panic(err)
}
buf, err := p.Bytes()
if err != nil {
panic(err)
}
err = writeFile(buf)
if err != nil {
panic(err)
}
}