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, }, Range: &chart.ContinuousRange{ 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) }