changed Mainframe from JFrame to JInternalFrame

[jalview.git] / forester / java / src / org / forester / util / BasicDescriptiveStatistics.java

diff --git a/forester/java/src/org/forester/util/BasicDescriptiveStatistics.java b/forester/java/src/org/forester/util/BasicDescriptiveStatistics.java
index dbb1db9..f3dfb80 100644 (file)
--- a/forester/java/src/org/forester/util/BasicDescriptiveStatistics.java
+++ b/forester/java/src/org/forester/util/BasicDescriptiveStatistics.java
@@ -23,7 +23,7 @@
 // Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
 //
 // Contact: phylosoft @ gmail . com
-// WWW: www.phylosoft.org/forester
+// WWW: https://sites.google.com/site/cmzmasek/home/software/forester
 
 package org.forester.util;
 
@@ -195,7 +195,7 @@ public class BasicDescriptiveStatistics implements DescriptiveStatistics {
     public double sampleVariance() {
         validate();
         if ( getN() < 2 ) {
-            throw new ArithmeticException( "attempt to calculate sample variance for less then two values" );
+            return 0;
         }
         return ( sumDeviations() / ( getN() - 1 ) );
     }
@@ -306,7 +306,7 @@ public class BasicDescriptiveStatistics implements DescriptiveStatistics {
      * Computes the sample standard unit (z-score). Used to compute 'value' in
      * terms of standard units. Note that 'value', 'mean' and 'sd' must be all
      * from the same sample data.
-     * 
+     *
      * @param value
      *            a double in the sample for which
      * @param mean