go-chart/_examples/poly_regression/main.go

43 lines
1.1 KiB
Go
Raw Normal View History

package main
import (
"net/http"
"github.com/wcharczuk/go-chart"
"github.com/wcharczuk/go-chart/seq"
)
func drawChart(res http.ResponseWriter, req *http.Request) {
/*
In this example we add a new type of series, a `PolynomialRegressionSeries` that takes another series as a required argument.
InnerSeries only needs to implement `ValuesProvider`, so really you could chain `PolynomialRegressionSeries` together if you wanted.
*/
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.
}
polyRegSeries := &chart.PolynomialRegressionSeries{
Degree: 3,
InnerSeries: mainSeries,
}
graph := chart.Chart{
Series: []chart.Series{
mainSeries,
polyRegSeries,
},
}
res.Header().Set("Content-Type", "image/png")
graph.Render(chart.PNG, res)
}
func main() {
http.HandleFunc("/", drawChart)
http.ListenAndServe(":8080", nil)
}