org.apache.mahout.cf.taste.hadoop.als
Class PredictionJob

java.lang.Object
  extended by org.apache.hadoop.conf.Configured
      extended by org.apache.mahout.common.AbstractJob
          extended by org.apache.mahout.cf.taste.hadoop.als.PredictionJob
All Implemented Interfaces:
org.apache.hadoop.conf.Configurable, org.apache.hadoop.util.Tool

public class PredictionJob
extends AbstractJob

Compute predictions for user,item pairs using an existing matrix factorization

Command line arguments specific to this class are:

  1. --output (path): path where output should go
  2. --pairs (path): path containing the test ratings, each line must be userID,itemID
  3. --userFeatures (path): path to the user feature matrix
  4. --itemFeatures (path): path to the item feature matrix


Nested Class Summary
static class PredictionJob.FeaturesMapper
           
static class PredictionJob.JoinProbesWithItemFeaturesReducer
           
static class PredictionJob.PairsMapper
           
static class PredictionJob.PredictRatingReducer
           
 
Constructor Summary
PredictionJob()
           
 
Method Summary
static void main(String[] args)
           
 int run(String[] args)
           
 
Methods inherited from class org.apache.mahout.common.AbstractJob
addFlag, addInputOption, addOption, addOption, addOption, addOption, addOutputOption, buildOption, getInputPath, getOption, getOutputPath, hasOption, keyFor, maybePut, parseArguments, parseDirectories, prepareJob, shouldRunNextPhase
 
Methods inherited from class org.apache.hadoop.conf.Configured
getConf, setConf
 
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.conf.Configurable
getConf, setConf
 

Constructor Detail

PredictionJob

public PredictionJob()
Method Detail

main

public static void main(String[] args)
                 throws Exception
Throws:
Exception

run

public int run(String[] args)
        throws Exception
Throws:
Exception


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