[Jboost-cvs] jboost/src/jboost/atree InstrumentedAlternatingTree.java, 1.3, 1.4

[Aaron A. <aa...@us...>]

Update of /cvsroot/jboost/jboost/src/jboost/atree
In directory sc8-pr-cvs6.sourceforge.net:/tmp/cvs-serv490/atree

Modified Files:
	InstrumentedAlternatingTree.java 
Log Message:
Fixed underflow bug in weights and outputting more information with InequalitySplitter NaN bug

Index: InstrumentedAlternatingTree.java
===================================================================
RCS file: /cvsroot/jboost/jboost/src/jboost/atree/InstrumentedAlternatingTree.java,v
retrieving revision 1.3
retrieving revision 1.4
diff -C2 -d -r1.3 -r1.4
*** InstrumentedAlternatingTree.java	2 Oct 2007 02:28:06 -0000	1.3
--- InstrumentedAlternatingTree.java	13 Oct 2007 04:32:27 -0000	1.4
***************
*** 624,627 ****
--- 624,639 ----
  	    return b.isFinished();
  	}
+ 
+ 	double EPS = 1e-50;
+ 	double w = m_booster.getTotalWeight();
+ 	if ((w < EPS) || Double.isNaN(w)) {
+ 	    System.out.println("JBoost boosting process is completed.");
+ 	    System.out.println("\tThe boosting has finished early.");
+ 	    System.out.println("\tThis is a result of too little weight being placed on examples");
+ 	    System.out.println("\t(which will cause an underflow error).");
+ 	    System.out.println("\tThis is not necessarily a bad thing.  Look at the margin curve to find out more.");
+ 	    return true;
+ 	}
+ 
  	return false;
      }