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This is an automatically generated e-mail. To reply, visit:
https://reviews.apache.org/r/3147/
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(Updated 2011-12-13 00:09:03.441301)
Review request for mahout.
Changes
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Added checks to ensure reliable operation with null matrices
Summary
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Here's a patch with a simple job to calculate the row mean (column-wise mean).
One outstanding issue is the combiner, this requires a wrtiable class
IntVectorTupleWritable, where the Int stores the number of rows, and the Vector
stores the column-wise sum.
This addresses bug MAHOUT-923.
https://issues.apache.org/jira/browse/MAHOUT-923
Diffs (updated)
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/trunk/core/src/main/java/org/apache/mahout/math/hadoop/DistributedRowMatrix.java
1213474
/trunk/core/src/main/java/org/apache/mahout/math/hadoop/MatrixRowMeanJob.java
PRE-CREATION
/trunk/core/src/test/java/org/apache/mahout/math/hadoop/TestDistributedRowMatrix.java
1213474
Diff: https://reviews.apache.org/r/3147/diff
Testing
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Junit test
Thanks,
Raphael
