org.apache.mahout.math.hadoop.stochasticsvd
Class BBtJob

java.lang.Object
  extended by org.apache.mahout.math.hadoop.stochasticsvd.BBtJob

public final class BBtJob
extends Object

Compute B*Bt using simple fact that B*Bt = sum(outer prod ( B_(*i), (B_(*i)) ).


Nested Class Summary
static class BBtJob.BBtMapper
           
static class BBtJob.BBtReducer
           
 
Field Summary
static String OUTPUT_BBT
           
 
Method Summary
static void run(org.apache.hadoop.conf.Configuration conf, org.apache.hadoop.fs.Path btPath, org.apache.hadoop.fs.Path outputPath, int numReduceTasks)
           
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Field Detail

OUTPUT_BBT

public static final String OUTPUT_BBT
See Also:
Constant Field Values
Method Detail

run

public static void run(org.apache.hadoop.conf.Configuration conf,
                       org.apache.hadoop.fs.Path btPath,
                       org.apache.hadoop.fs.Path outputPath,
                       int numReduceTasks)
                throws IOException,
                       ClassNotFoundException,
                       InterruptedException
Throws:
IOException
ClassNotFoundException
InterruptedException


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