fix for issues/56

_examples/pie_chart/main.go

@@ -30,7 +30,26 @@ func drawChart(res http.ResponseWriter, req *http.Request) {
 	}
 }
 
+func drawChartRegression(res http.ResponseWriter, req *http.Request) {
+	pie := chart.PieChart{
+		Width:  512,
+		Height: 512,
+		Values: []chart.Value{
+			{Value: 5, Label: "Blue"},
+			{Value: 2, Label: "Two"},
+			{Value: 1, Label: "One"},
+		},
+	}
+
+	res.Header().Set("Content-Type", chart.ContentTypeSVG)
+	err := pie.Render(chart.SVG, res)
+	if err != nil {
+		fmt.Printf("Error rendering pie chart: %v\n", err)
+	}
+}
+
 func main() {
 	http.HandleFunc("/", drawChart)
+	http.HandleFunc("/reg", drawChartRegression)
 	log.Fatal(http.ListenAndServe(":8080", nil))
 }