[DL-Learner SVN] SF.net SVN: dl-learner:[3979] trunk/components-core/src/main/java/org/ dllearner/learningproblems/Heuristics.java

[<jen...@us...>]

Revision: 3979
          http://sourceforge.net/p/dl-learner/code/3979
Author:   jenslehmann
Date:     2013-05-10 21:55:32 +0000 (Fri, 10 May 2013)
Log Message:
-----------
bug fix in F-beta

Modified Paths:
--------------
    trunk/components-core/src/main/java/org/dllearner/learningproblems/Heuristics.java

Modified: trunk/components-core/src/main/java/org/dllearner/learningproblems/Heuristics.java
===================================================================
--- trunk/components-core/src/main/java/org/dllearner/learningproblems/Heuristics.java	2013-05-10 13:27:03 UTC (rev 3978)
+++ trunk/components-core/src/main/java/org/dllearner/learningproblems/Heuristics.java	2013-05-10 21:55:32 UTC (rev 3979)
@@ -52,10 +52,10 @@
 	 */
 	public static double getFScore(double recall, double precision, double beta) {
 		return (precision + recall == 0) ? 0 :
-			  ( (1+Math.sqrt(beta)) * (precision * recall)
-					/ (Math.sqrt(beta) * precision + recall) ); 		
+			  ( (1+ beta * beta) * (precision * recall)
+					/ (beta * beta * precision + recall) ); 		
 	}	
-
+	
 	/**
 	 * Computes arithmetic mean of precision and recall, which is called "A-Score"
 	 * here (A=arithmetic), but is not an established notion in machine learning.  

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