Return immediately when there is no deviation

alpacahq · Nov 19, 2020 · 813def9 · 813def9
1 parent f6c8176
commit 813def9
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/uda/anomaly/anomaly.go b/uda/anomaly/anomaly.go
@@ -156,7 +156,8 @@ func (a *Anomaly) detectByZSCore(epochs []int64, series []float64, columnNr int)
 	m := stat.Mean(series, nil)
 	s := stat.StdDev(series, nil)
 	if s == 0 {
-		s = 1
+		// no deviation
+		return
 	}
 
 	for i, x := range series {