[Gridsim-commits] SF.net SVN: gridsim: [72] trunk/source/gridsim/Accumulator.java

[<sul...@us...>]

Revision: 72
          http://gridsim.svn.sourceforge.net/gridsim/?rev=72&view=rev
Author:   sulistio
Date:     2007-10-17 18:28:20 -0700 (Wed, 17 Oct 2007)

Log Message:
-----------
Fix a bug #1807701 as suggested by Stanislaw Szczepanowski.

Modified Paths:
--------------
    trunk/source/gridsim/Accumulator.java

Modified: trunk/source/gridsim/Accumulator.java
===================================================================
--- trunk/source/gridsim/Accumulator.java	2007-10-17 01:14:31 UTC (rev 71)
+++ trunk/source/gridsim/Accumulator.java	2007-10-18 01:28:20 UTC (rev 72)
@@ -4,7 +4,7 @@
  *               of Parallel and Distributed Systems such as Clusters and Grids
  * Licence:      GPL - http://www.gnu.org/copyleft/gpl.html
  *
- * $Id: Accumulator.java,v 1.13 2004/11/01 02:52:33 anthony Exp $
+ * $Id: Accumulator.java,v 1.14 2007/10/18 01:26:48 anthony Exp $
  */
 
 package gridsim;
@@ -132,10 +132,20 @@
      * @post $none
      */
     public double getStandardDeviation() {
-        return sqrMean_ - (mean_ * mean_);
+        return Math.sqrt( this.getVariance() );
     }
 
     /**
+     * Calculates the variance of accumulated items
+     * @return the Standard Deviation of accumulated items
+     * @pre $none
+     * @post $none
+     */
+    public double getVariance() {
+    	return sqrMean_ - (mean_ * mean_);
+    }
+
+    /**
      * Finds the smallest number of accumulated items
      * @deprecated As of GridSim 2.1, replaced by {@link #getMin()}
      * @return the smallest of accumulated items


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