From: Mohammad Salehe <salehe@cs.toronto.edu>
Date: Sun, 30 Dec 2018 02:40:46 +0000 (-0500)
Subject: Calculate standard deviation in stats
X-Git-Url: https://gerrit.onap.org/r/gitweb?a=commitdiff_plain;h=refs%2Fchanges%2F28%2F78128%2F2;p=music.git

Calculate standard deviation in stats

Calculate standard deviation correctly in
stats in SamplerHistogramTimeMeasure

Change-Id: I1448cf219872987ce348bbd6e70d6ac5ac99bdc2
Issue-ID: MUSIC-148
Signed-off-by: Mohammad Salehe <salehe@cs.toronto.edu>
---

diff --git a/src/main/java/org/onap/music/util/SamplerHistogramTimeMeasure.java b/src/main/java/org/onap/music/util/SamplerHistogramTimeMeasure.java
index b1766e08..e1369dc7 100644
--- a/src/main/java/org/onap/music/util/SamplerHistogramTimeMeasure.java
+++ b/src/main/java/org/onap/music/util/SamplerHistogramTimeMeasure.java
@@ -95,9 +95,9 @@ public class SamplerHistogramTimeMeasure implements TimeMeasure
                         entry -> {
                             Stats s = Stats.of(entry.getValue().getSamples());
                             if (s.count() <= SAMPLER_SIZE)
-                                return new ImmutablePair<>(s.mean(), s.populationStandardDeviation() / s.count());
+                                return new ImmutablePair<>(s.mean(), s.populationStandardDeviation() / 1);
                             else
-                                return new ImmutablePair<>(s.mean(), s.sampleStandardDeviation() / s.count());
+                                return new ImmutablePair<>(s.mean(), s.sampleStandardDeviation() / 1);
 
                         }
                 ));