org.apache.mahout.clustering.spectral.eigencuts
Class EigencutsSensitivityReducer

java.lang.Object
  org.apache.hadoop.mapreduce.Reducer<org.apache.hadoop.io.IntWritable,EigencutsSensitivityNode,org.apache.hadoop.io.IntWritable,VectorWritable>
      org.apache.mahout.clustering.spectral.eigencuts.EigencutsSensitivityReducer

public class EigencutsSensitivityReducer
extends org.apache.hadoop.mapreduce.Reducer<org.apache.hadoop.io.IntWritable,EigencutsSensitivityNode,org.apache.hadoop.io.IntWritable,VectorWritable>

The point of this class is to take all the arrays of sensitivities and convert them to a single matrix. Since there may be many values that, according to their (i, j) coordinates, overlap in the matrix, the "winner" will be determined by whichever value is smaller.

Nested Class Summary

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

org.apache.hadoop.mapreduce.Reducer.Context

Constructor Summary

EigencutsSensitivityReducer()

Method Summary

protected void

reduce(org.apache.hadoop.io.IntWritable key, Iterable<EigencutsSensitivityNode> arr, org.apache.hadoop.mapreduce.Reducer.Context context)

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

EigencutsSensitivityReducer

public EigencutsSensitivityReducer()

Method Detail

reduce

protected void reduce(org.apache.hadoop.io.IntWritable key,
                      Iterable<EigencutsSensitivityNode> arr,
                      org.apache.hadoop.mapreduce.Reducer.Context context)
               throws IOException,
                      InterruptedException

Overrides:

reduce in class org.apache.hadoop.mapreduce.Reducer<org.apache.hadoop.io.IntWritable,EigencutsSensitivityNode,org.apache.hadoop.io.IntWritable,VectorWritable>

Throws:

IOException

InterruptedException