Try using the trunk version. We are about to release 0.3 and it has significant improvements.
On Thu, Mar 11, 2010 at 9:40 AM, Yang Sun <[email protected]> wrote: > Hi, > > It's the first time I try to use mahout. But the Breiman example gave me > the > following exception: > > [localhost]$ hadoop jar examples/target/mahout-examples-0.2.job > org.apache.mahout.df.BreimanExample -d test_data/glass.data -ds test_data/ > glass.info -i 10 -t 100 > 10/03/11 09:26:07 INFO df.BreimanExample: Iteration 0 > 10/03/11 09:26:07 INFO df.BreimanExample: Growing a forest with m=4 > 10/03/11 09:26:07 INFO ref.SequentialBuilder: Building 10% > 10/03/11 09:26:07 INFO ref.SequentialBuilder: Building 20% > 10/03/11 09:26:07 INFO ref.SequentialBuilder: Building 30% > 10/03/11 09:26:07 INFO ref.SequentialBuilder: Building 40% > 10/03/11 09:26:07 INFO ref.SequentialBuilder: Building 50% > 10/03/11 09:26:07 INFO ref.SequentialBuilder: Building 60% > 10/03/11 09:26:07 INFO ref.SequentialBuilder: Building 70% > 10/03/11 09:26:07 INFO ref.SequentialBuilder: Building 80% > 10/03/11 09:26:07 INFO ref.SequentialBuilder: Building 90% > 10/03/11 09:26:07 INFO ref.SequentialBuilder: Building 100% > 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) > > Can any one help me get through it? > > Thanks, > Yang >
