go-chart/_examples/simple_moving_average/main.go
2018-12-06 16:46:27 +01:00

39 lines
1.0 KiB
Go

package main
import (
"net/http"
"git.gutmet.org/go-chart.git"
"git.gutmet.org/go-chart.git/seq"
)
func drawChart(res http.ResponseWriter, req *http.Request) {
mainSeries := chart.ContinuousSeries{
Name: "A test series",
XValues: seq.Range(1.0, 100.0), //generates a []float64 from 1.0 to 100.0 in 1.0 step increments, or 100 elements.
YValues: seq.RandomValuesWithMax(100, 100), //generates a []float64 randomly from 0 to 100 with 100 elements.
}
// note we create a SimpleMovingAverage series by assignin the inner series.
// we need to use a reference because `.Render()` needs to modify state within the series.
smaSeries := &chart.SMASeries{
InnerSeries: mainSeries,
} // we can optionally set the `WindowSize` property which alters how the moving average is calculated.
graph := chart.Chart{
Series: []chart.Series{
mainSeries,
smaSeries,
},
}
res.Header().Set("Content-Type", "image/png")
graph.Render(chart.PNG, res)
}
func main() {
http.HandleFunc("/", drawChart)
http.ListenAndServe(":8080", nil)
}