go-chart/examples/custom_ticks/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 set of ticks to use for the y-axis. It can be (almost) whatever you want, including some custom labels for ticks.
Custom ticks will supercede a custom range, which will supercede automatic generation based on series values.
*/
graph := chart.Chart{
YAxis: chart.YAxis{
Style: chart.Style{
Show: true,
},
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Range: &chart.ContinuousRange{
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Min: 0.0,
Max: 4.0,
},
Ticks: []chart.Tick{
{0.0, "0.00"},
{2.0, "2.00"},
{4.0, "4.00"},
{6.0, "6.00"},
{8.0, "Eight"},
{10.0, "Ten"},
},
},
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)
}