go-chart/_examples/twopoint/main.go

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2017-02-03 20:26:53 +01:00
package main
import (
"bytes"
"log"
"os"
"github.com/wcharczuk/go-chart"
2017-02-03 20:26:53 +01:00
)
func main() {
var b float64
b = 1000
ts1 := chart.ContinuousSeries{ //TimeSeries{
Name: "Time Series",
Style: chart.Style{
Show: true,
},
XValues: []float64{10 * b, 20 * b, 30 * b, 40 * b, 50 * b, 60 * b, 70 * b, 80 * b},
YValues: []float64{1.0, 2.0, 30.0, 4.0, 50.0, 6.0, 7.0, 88.0},
}
ts2 := chart.ContinuousSeries{ //TimeSeries{
Style: chart.Style{
Show: true,
StrokeColor: chart.GetDefaultColor(1),
},
XValues: []float64{10 * b, 20 * b, 30 * b, 40 * b, 50 * b, 60 * b, 70 * b, 80 * b},
YValues: []float64{15.0, 52.0, 30.0, 42.0, 50.0, 26.0, 77.0, 38.0},
}
graph := chart.Chart{
XAxis: chart.XAxis{
Name: "The XAxis",
NameStyle: chart.StyleShow(),
Style: chart.StyleShow(),
ValueFormatter: chart.TimeMinuteValueFormatter, //TimeHourValueFormatter,
},
YAxis: chart.YAxis{
Name: "The YAxis",
NameStyle: chart.StyleShow(),
Style: chart.StyleShow(),
},
Series: []chart.Series{
ts1,
ts2,
},
}
buffer := bytes.NewBuffer([]byte{})
err := graph.Render(chart.PNG, buffer)
if err != nil {
log.Fatal(err)
}
fo, err := os.Create("output.png")
if err != nil {
panic(err)
}
if _, err := fo.Write(buffer.Bytes()); err != nil {
panic(err)
}
}