dont start at zero

config.go

@@ -30,7 +30,7 @@ type Data struct {
 }
 
 func newConfig() (Config, error) {
-	dataPoints := envOr("DATA_POINTS", `[[1, 1], [1, 2], [2, 1], [2, 1], [4, 3]]`)
+	dataPoints := envOr("DATA_POINTS", `[[11, 21], [11, 22], [12, 21], [12, 21], [14, 23]]`)
 	dataLabels := envOr("DATA_LABELS", ``)
 	dataWeightRange := envOr("DATA_WEIGHT_RANGE", `20`)
 	dataWeightFloor := envOr("DATA_WEIGHT_FLOOR", `12`)

main.go

@@ -33,6 +33,37 @@ func run(ctx context.Context) error {
 	}
 	log.Printf("%s: (%s, %s) = %v", config.Data.Title, x, y, data)
 
+	minX, maxX := data[0].Value.([]float64)[0], data[0].Value.([]float64)[0]
+	minY, maxY := data[0].Value.([]float64)[1], data[0].Value.([]float64)[1]
+	for _, datum := range data {
+		x := datum.Value.([]float64)[0]
+		if x < minX {
+			minX = x
+		} else if x > maxX {
+			maxX = x
+		}
+		y := datum.Value.([]float64)[1]
+		if y < minY {
+			minY = y
+		} else if y > maxY {
+			maxY = y
+		}
+	}
+
+	if 0 <= minX && minX <= 1 {
+		minX = 0
+	} else if 1 <= minX {
+		minX -= 1
+		maxX += 1
+	}
+	if 0 <= minY && minY <= 1 {
+		minY = 0
+	} else if 1 <= minY {
+		minY -= 1
+		maxY += 1
+	}
+	log.Printf("x=[%v, %v] y=[%v, %v]", minX, maxX, minY, maxY)
+
 	scatter := charts.NewScatter()
 	scatter.SetGlobalOptions(
 		charts.WithTitleOpts(opts.Title{
@@ -48,11 +79,15 @@ func run(ctx context.Context) error {
 			Name:         x,
 			NameLocation: "middle",
 			NameGap:      config.Data.Weight.Floor + config.Data.Weight.Range,
+			Min:          minX,
+			Max:          maxX,
 		}),
 		charts.WithYAxisOpts(opts.YAxis{
 			Name:         y,
 			NameLocation: "middle",
 			NameGap:      config.Data.Weight.Floor + config.Data.Weight.Range,
+			Min:          minY,
+			Max:          maxY,
 		}),
 	)
 	scatter.AddSeries(y, data)