go-chart/examples/min_max/main.go
2016-08-06 15:53:14 -07:00

62 lines
1.2 KiB
Go

package main
import (
"net/http"
"github.com/wcharczuk/go-chart"
)
func drawChart(res http.ResponseWriter, req *http.Request) {
mainSeries := chart.ContinuousSeries{
Name: "A test series",
XValues: chart.Sequence.Float64(1.0, 100.0),
YValues: chart.Sequence.RandomWithAverage(100, 100, 50),
}
minSeries := &chart.MinSeries{
Style: chart.Style{
Show: true,
StrokeColor: chart.ColorAlternateGray,
StrokeDashArray: []float64{5.0, 5.0},
},
InnerSeries: mainSeries,
}
maxSeries := &chart.MaxSeries{
Style: chart.Style{
Show: true,
StrokeColor: chart.ColorAlternateGray,
StrokeDashArray: []float64{5.0, 5.0},
},
InnerSeries: mainSeries,
}
graph := chart.Chart{
YAxis: chart.YAxis{
Style: chart.StyleShow(),
Range: &chart.ContinuousRange{
Min: 25,
Max: 175,
},
},
XAxis: chart.XAxis{
Style: chart.StyleShow(),
},
Series: []chart.Series{
mainSeries,
minSeries,
maxSeries,
chart.LastValueAnnotation(minSeries),
chart.LastValueAnnotation(maxSeries),
},
}
res.Header().Set("Content-Type", "image/png")
graph.Render(chart.PNG, res)
}
func main() {
http.HandleFunc("/", drawChart)
http.ListenAndServe(":8080", nil)
}