package main import ( "net/http" "git.gutmet.org/go-chart.git" ) 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(), Range: &chart.ContinuousRange{ 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) }