weka.distributed.hadoop

Class CorrelationMatrixRowHadoopReducer

java.lang.Object

org.apache.hadoop.mapreduce.Reducer<org.apache.hadoop.io.Text,org.apache.hadoop.io.BytesWritable,org.apache.hadoop.io.Text,org.apache.hadoop.io.Text>

weka.distributed.hadoop.CorrelationMatrixRowHadoopReducer

public class CorrelationMatrixRowHadoopReducer
extends org.apache.hadoop.mapreduce.Reducer<org.apache.hadoop.io.Text,org.apache.hadoop.io.BytesWritable,org.apache.hadoop.io.Text,org.apache.hadoop.io.Text>

Hadoop Reducer implementation for the correlation matrix job. Aggregates a given row (row number is key) of the matrix.

Version:

$Revision: 11837 $

Author:

Mark Hall (mhall{[at]}pentaho{[dot]}com)

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.hadoop.mapreduce.Reducer

org.apache.hadoop.mapreduce.Reducer.Context

Constructor Summary

Constructors

Constructor and Description
CorrelationMatrixRowHadoopReducer()

Method Summary

Modifier and Type	Method and Description
void	reduce(org.apache.hadoop.io.Text key, java.lang.Iterable<org.apache.hadoop.io.BytesWritable> values, org.apache.hadoop.mapreduce.Reducer.Context context)
void	setup(org.apache.hadoop.mapreduce.Reducer.Context context)

Methods inherited from class org.apache.hadoop.mapreduce.Reducer

run

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

CorrelationMatrixRowHadoopReducer

public CorrelationMatrixRowHadoopReducer()

Method Detail

setup

public void setup(org.apache.hadoop.mapreduce.Reducer.Context context)
           throws java.io.IOException

Overrides:

setup in class org.apache.hadoop.mapreduce.Reducer<org.apache.hadoop.io.Text,org.apache.hadoop.io.BytesWritable,org.apache.hadoop.io.Text,org.apache.hadoop.io.Text>

Throws:

java.io.IOException

reduce

public void reduce(org.apache.hadoop.io.Text key,
                   java.lang.Iterable<org.apache.hadoop.io.BytesWritable> values,
                   org.apache.hadoop.mapreduce.Reducer.Context context)
            throws java.io.IOException

Overrides:

reduce in class org.apache.hadoop.mapreduce.Reducer<org.apache.hadoop.io.Text,org.apache.hadoop.io.BytesWritable,org.apache.hadoop.io.Text,org.apache.hadoop.io.Text>

Throws:

java.io.IOException