X-Git-Url: https://gerrit.fd.io/r/gitweb?p=csit.git;a=blobdiff_plain;f=resources%2Ftools%2Fpresentation%2Futils.py;h=c350fae13543ddd09dcc744e8803b9b80b17a3c5;hp=3fdec857740e5a6f70c8f09810b70f695584b041;hb=fce7b4b339f7a79b80143bbd796460720489d694;hpb=1469b71f48bb4e397ebaa65fbaf0512be691ec49

diff --git a/resources/tools/presentation/utils.py b/resources/tools/presentation/utils.py
index 3fdec85774..c350fae135 100644
--- a/resources/tools/presentation/utils.py
+++ b/resources/tools/presentation/utils.py
@@ -24,8 +24,8 @@ import prettytable
 from os import walk, makedirs, environ
 from os.path import join, isdir
 from shutil import move, Error
-from math import sqrt
 from datetime import datetime
+from pandas import Series
 
 from errors import PresentationError
 from jumpavg.BitCountingClassifier import BitCountingClassifier
@@ -51,11 +51,7 @@ def stdev(items):
     :returns: Stdev.
     :rtype: float
     """
-
-    avg = mean(items)
-    variance = [(x - avg) ** 2 for x in items]
-    stddev = sqrt(mean(variance))
-    return stddev
+    return Series.std(Series(items))
 
 
 def relative_change(nr1, nr2):