Merge pull request #1689 from anywhy/fix_float64_series

fix float64 series use mean or stdev function result is zero

pkg/types/series_float64.go

@@ -13,7 +13,7 @@ type Float64Series struct {
 func NewFloat64Series(v ...float64) *Float64Series {
 	s := &Float64Series{}
 	s.Slice = v
-	s.SeriesBase.Series = s.Slice
+	s.SeriesBase.Series = &s.Slice
 	return s
 }
 

pkg/types/series_float64_test.go

@@ -0,0 +1,18 @@
+package types
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestSeriesBaseFuncWithPushData(t *testing.T) {
+	series := NewFloat64Series(0.5, 1.0)
+	series.Push(2.5)
+	series.Push(3.0)
+	series.Push(4.0)
+	mean := series.Mean(5)
+	assert.Equal(t, 2.2, mean)
+	stdev := series.Stdev(5)
+	assert.Equal(t, 1.2884098726725126, stdev)
+}