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Posted to commits@mahout.apache.org by td...@apache.org on 2010/09/17 21:51:44 UTC

svn commit: r998287 - /mahout/trunk/core/src/main/java/org/apache/mahout/math/stats/OnlineAuc.java

Author: tdunning
Date: Fri Sep 17 19:51:44 2010
New Revision: 998287

URL: http://svn.apache.org/viewvc?rev=998287&view=rev
Log:
Made OnlineAuc more pessimistic

Modified:
    mahout/trunk/core/src/main/java/org/apache/mahout/math/stats/OnlineAuc.java

Modified: mahout/trunk/core/src/main/java/org/apache/mahout/math/stats/OnlineAuc.java
URL: http://svn.apache.org/viewvc/mahout/trunk/core/src/main/java/org/apache/mahout/math/stats/OnlineAuc.java?rev=998287&r1=998286&r2=998287&view=diff
==============================================================================
--- mahout/trunk/core/src/main/java/org/apache/mahout/math/stats/OnlineAuc.java (original)
+++ mahout/trunk/core/src/main/java/org/apache/mahout/math/stats/OnlineAuc.java Fri Sep 17 19:51:44 2010
@@ -38,7 +38,7 @@ public class OnlineAuc {
     FIFO, FAIR, RANDOM
   }
 
-  public static final int HISTORY = 10;
+  public static final int HISTORY = 100;
 
   private ReplacementPolicy policy = ReplacementPolicy.FAIR;
   private transient Random random = org.apache.mahout.common.RandomUtils.getRandom();
@@ -90,7 +90,7 @@ public class OnlineAuc {
           break;
         }
         count++;
-        double z = 0.5;
+        double z = 0;
         if (score > v) {
           z = 1.0;
         } else if (score < v) {