103 lines
1.5 KiB
Go
103 lines
1.5 KiB
Go
package main
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import (
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"io/ioutil"
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"os"
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"path/filepath"
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"github.com/vicanso/go-charts"
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)
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func writeFile(buf []byte) error {
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tmpPath := "./tmp"
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err := os.MkdirAll(tmpPath, 0700)
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if err != nil {
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return err
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}
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file := filepath.Join(tmpPath, "bar-chart.png")
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err = ioutil.WriteFile(file, buf, 0600)
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if err != nil {
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return err
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}
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return nil
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}
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func main() {
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values := [][]float64{
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{
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2.0,
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4.9,
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7.0,
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23.2,
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25.6,
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76.7,
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135.6,
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162.2,
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32.6,
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20.0,
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6.4,
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3.3,
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},
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{
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2.6,
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5.9,
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9.0,
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26.4,
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28.7,
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70.7,
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175.6,
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182.2,
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48.7,
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18.8,
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6.0,
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2.3,
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},
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}
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p, err := charts.BarRender(
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values,
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charts.XAxisDataOptionFunc([]string{
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"Jan",
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"Feb",
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"Mar",
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"Apr",
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"May",
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"Jun",
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"Jul",
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"Aug",
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"Sep",
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"Oct",
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"Nov",
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"Dec",
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}),
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charts.LegendLabelsOptionFunc([]string{
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"Rainfall",
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"Evaporation",
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}, charts.PositionRight),
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charts.MarkLineOptionFunc(0, charts.SeriesMarkDataTypeAverage),
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charts.MarkPointOptionFunc(0, charts.SeriesMarkDataTypeMax,
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charts.SeriesMarkDataTypeMin),
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// custom option func
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func(opt *charts.ChartOption) {
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opt.SeriesList[1].MarkPoint = charts.NewMarkPoint(
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charts.SeriesMarkDataTypeMax,
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charts.SeriesMarkDataTypeMin,
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)
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opt.SeriesList[1].MarkLine = charts.NewMarkLine(
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charts.SeriesMarkDataTypeAverage,
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)
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},
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)
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if err != nil {
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panic(err)
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}
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buf, err := p.Bytes()
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if err != nil {
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panic(err)
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}
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err = writeFile(buf)
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if err != nil {
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panic(err)
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}
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}
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