org.apache.mahout.classifier.bayes.mapreduce.common
Class BayesWeightSummerMapper

java.lang.Object
  extended by org.apache.hadoop.mapred.MapReduceBase
      extended by org.apache.mahout.classifier.bayes.mapreduce.common.BayesWeightSummerMapper
All Implemented Interfaces:
java.io.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 BayesWeightSummerMapper
extends org.apache.hadoop.mapred.MapReduceBase
implements org.apache.hadoop.mapred.Mapper<StringTuple,org.apache.hadoop.io.DoubleWritable,StringTuple,org.apache.hadoop.io.DoubleWritable>

Calculates weight sum for a unique label, and feature


Constructor Summary
BayesWeightSummerMapper()
           
 
Method Summary
 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 weight sums across each label and each feature
 
Methods inherited from class org.apache.hadoop.mapred.MapReduceBase
close, configure
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 
Methods inherited from interface org.apache.hadoop.mapred.JobConfigurable
configure
 
Methods inherited from interface java.io.Closeable
close
 

Constructor Detail

BayesWeightSummerMapper

public BayesWeightSummerMapper()
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 java.io.IOException
We need to calculate the weight sums across each label and each feature

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 tuple containing the tfidf value
Throws:
java.io.IOException


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