org.apache.mahout.utils.eval
Class ParallelFactorizationEvaluator.ErrorReducer

java.lang.Object
  extended by org.apache.hadoop.mapreduce.Reducer<IntPairWritable,org.apache.hadoop.io.DoubleWritable,org.apache.hadoop.io.DoubleWritable,org.apache.hadoop.io.NullWritable>
      extended by org.apache.mahout.utils.eval.ParallelFactorizationEvaluator.ErrorReducer
Enclosing class:
ParallelFactorizationEvaluator

public static class ParallelFactorizationEvaluator.ErrorReducer
extends org.apache.hadoop.mapreduce.Reducer<IntPairWritable,org.apache.hadoop.io.DoubleWritable,org.apache.hadoop.io.DoubleWritable,org.apache.hadoop.io.NullWritable>


Nested Class Summary
 
Nested classes/interfaces inherited from class org.apache.hadoop.mapreduce.Reducer
org.apache.hadoop.mapreduce.Reducer.Context
 
Constructor Summary
ParallelFactorizationEvaluator.ErrorReducer()
           
 
Method Summary
protected  void reduce(IntPairWritable key, Iterable<org.apache.hadoop.io.DoubleWritable> ratingAndEstimate, org.apache.hadoop.mapreduce.Reducer.Context ctx)
           
 
Methods inherited from class org.apache.hadoop.mapreduce.Reducer
cleanup, run, setup
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

ParallelFactorizationEvaluator.ErrorReducer

public ParallelFactorizationEvaluator.ErrorReducer()
Method Detail

reduce

protected void reduce(IntPairWritable key,
                      Iterable<org.apache.hadoop.io.DoubleWritable> ratingAndEstimate,
                      org.apache.hadoop.mapreduce.Reducer.Context ctx)
               throws IOException,
                      InterruptedException
Overrides:
reduce in class org.apache.hadoop.mapreduce.Reducer<IntPairWritable,org.apache.hadoop.io.DoubleWritable,org.apache.hadoop.io.DoubleWritable,org.apache.hadoop.io.NullWritable>
Throws:
IOException
InterruptedException


Copyright © 2008-2011 The Apache Software Foundation. All Rights Reserved.