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From "Roshan A. Punnoose" <rpunno...@proteuseng.com>
Subject Breiman example issues
Date Tue, 22 Dec 2009 01:01:21 GMT
Hi,

I am trying to run the Breiman decision tree at http://cwiki.apache.org/MAHOUT/breiman-example.html
with the glass data, but I keep getting this error when I actually run the Breiman example:

Exception in thread "main" java.lang.IllegalArgumentException: labels.length != predictions.length
        at org.apache.mahout.df.ErrorEstimate.errorRate(ErrorEstimate.java:29)
        at org.apache.mahout.df.BreimanExample.runIteration(BreimanExample.java:108)
        at org.apache.mahout.df.BreimanExample.run(BreimanExample.java:214)
        at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:65)
        at org.apache.mahout.df.BreimanExample.main(BreimanExample.java:143)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:597)
        at org.apache.hadoop.util.RunJar.main(RunJar.java:156)


I believe I’m at the latest trunk since a week ago.

Roshan

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