From 0639ccbdff1f4cc65d4b25004cf0887abc76ff5c Mon Sep 17 00:00:00 2001
From: Victor Marin <36818606+mdvictor@users.noreply.github.com>
Date: Thu, 7 Apr 2022 09:56:23 +0300
Subject: [PATCH] Histogram Panel: Take decimal into consideration (#47330)

---
 .../src/transformations/transformers/histogram.ts           | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/packages/grafana-data/src/transformations/transformers/histogram.ts b/packages/grafana-data/src/transformations/transformers/histogram.ts
index eef3698c90e..a48f00c1861 100644
--- a/packages/grafana-data/src/transformations/transformers/histogram.ts
+++ b/packages/grafana-data/src/transformations/transformers/histogram.ts
@@ -159,7 +159,9 @@ export function buildHistogram(frames: DataFrame[], options?: HistogramTransform
     for (const frame of frames) {
       for (const field of frame.fields) {
         if (field.type === FieldType.number) {
-          allValues = allValues.concat(field.values.toArray());
+          allValues = allValues.concat(
+            field.values.toArray().map((val: number) => Number(val.toFixed(field.config.decimals ?? 0)))
+          );
         }
       }
     }
@@ -217,7 +219,7 @@ export function buildHistogram(frames: DataFrame[], options?: HistogramTransform
             unit: undefined,
           },
         });
-        if (!config && field.config.unit) {
+        if (!config && Object.keys(field.config).length) {
           config = field.config;
         }
       }