go-chart/_examples/custom_ranges/main.go

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2016-07-17 05:53:46 +02:00
package main
import (
"net/http"
"github.com/wcharczuk/go-chart"
)
func drawChart(res http.ResponseWriter, req *http.Request) {
/*
In this example we set a custom range for the y-axis, overriding the automatic range generation.
Note: the chart will still generate the ticks automatically based on the custom range, so the intervals may be a bit weird.
*/
graph := chart.Chart{
YAxis: chart.YAxis{
Style: chart.StyleShow(),
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Range: &chart.ContinuousRange{
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Min: 0.0,
Max: 10.0,
},
},
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},
},
},
}
res.Header().Set("Content-Type", "image/png")
graph.Render(chart.PNG, res)
}
func main() {
http.HandleFunc("/", drawChart)
http.ListenAndServe(":8080", nil)
}