From 22bbd2cf6718037523e46c9156465dfd45698aef Mon Sep 17 00:00:00 2001
From: Thomas Oettli <spacefreak@noop.ch>
Date: Sat, 30 Nov 2024 02:25:52 +0100
Subject: [PATCH] fix SummarizeValues average value

---
 pkg/expr/helper/helper.go | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/pkg/expr/helper/helper.go b/pkg/expr/helper/helper.go
index 1bf12a44..d90c1ac1 100644
--- a/pkg/expr/helper/helper.go
+++ b/pkg/expr/helper/helper.go
@@ -201,12 +201,16 @@ func SummarizeValues(f string, values []float64, absent []bool) (float64, bool,
 			rv += av
 		}
 	case "avg", "average":
+		total := 0
 		for i, av := range values {
 			if !absent[i] {
 				rv += av
+				total++
 			}
 		}
-		rv /= float64(len(values))
+		if total > 0 {
+			rv /= float64(total)
+		}
 	case "max":
 		rv = math.Inf(-1)
 		for _, av := range values {