org.apache.mahout.classifier.bayes.mapreduce.cbayes
Class CBayesThetaNormalizerMapper

java.lang.Object
  extended by org.apache.hadoop.mapred.MapReduceBase
      extended by org.apache.mahout.classifier.bayes.mapreduce.cbayes.CBayesThetaNormalizerMapper
All Implemented Interfaces:
Closeable, org.apache.hadoop.mapred.JobConfigurable, org.apache.hadoop.mapred.Mapper<StringTuple,org.apache.hadoop.io.DoubleWritable,StringTuple,org.apache.hadoop.io.DoubleWritable>

public class CBayesThetaNormalizerMapper
extends org.apache.hadoop.mapred.MapReduceBase
implements org.apache.hadoop.mapred.Mapper<StringTuple,org.apache.hadoop.io.DoubleWritable,StringTuple,org.apache.hadoop.io.DoubleWritable>

Mapper for Calculating the ThetaNormalizer for a label in Naive Bayes Algorithm


Constructor Summary
CBayesThetaNormalizerMapper()
           
 
Method Summary
 void configure(org.apache.hadoop.mapred.JobConf job)
           
 void map(StringTuple key, org.apache.hadoop.io.DoubleWritable value, org.apache.hadoop.mapred.OutputCollector<StringTuple,org.apache.hadoop.io.DoubleWritable> output, org.apache.hadoop.mapred.Reporter reporter)
          We need to calculate the idf of each feature in each label
 
Methods inherited from class org.apache.hadoop.mapred.MapReduceBase
close
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 
Methods inherited from interface java.io.Closeable
close
 

Constructor Detail

CBayesThetaNormalizerMapper

public CBayesThetaNormalizerMapper()
Method Detail

map

public void map(StringTuple key,
                org.apache.hadoop.io.DoubleWritable value,
                org.apache.hadoop.mapred.OutputCollector<StringTuple,org.apache.hadoop.io.DoubleWritable> output,
                org.apache.hadoop.mapred.Reporter reporter)
         throws IOException
We need to calculate the idf of each feature in each label

Specified by:
map in interface org.apache.hadoop.mapred.Mapper<StringTuple,org.apache.hadoop.io.DoubleWritable,StringTuple,org.apache.hadoop.io.DoubleWritable>
Parameters:
key - The label,feature pair (can either be the freq Count or the term Document count
Throws:
IOException

configure

public void configure(org.apache.hadoop.mapred.JobConf job)
Specified by:
configure in interface org.apache.hadoop.mapred.JobConfigurable
Overrides:
configure in class org.apache.hadoop.mapred.MapReduceBase


Copyright © 2008-2012 The Apache Software Foundation. All Rights Reserved.