org.apache.mahout.math.hadoop

Class TransposeJob

java.lang.Object

org.apache.hadoop.conf.Configured

org.apache.mahout.common.AbstractJob

org.apache.mahout.math.hadoop.TransposeJob

All Implemented Interfaces:

org.apache.hadoop.conf.Configurable, org.apache.hadoop.util.Tool

public class TransposeJob
extends AbstractJob

Transpose a matrix

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	TransposeJob.MergeVectorsCombiner
static class	TransposeJob.MergeVectorsReducer
static class	TransposeJob.TransposeMapper

Field Summary

Fields

Modifier and Type	Field and Description
static String	NUM_ROWS_KEY

Fields inherited from class org.apache.mahout.common.AbstractJob

argMap, inputFile, inputPath, outputFile, outputPath, tempPath

Constructor Summary

Constructors

Constructor and Description
TransposeJob()

Method Summary

Methods

Modifier and Type	Method and Description
static org.apache.hadoop.conf.Configuration	buildTransposeJobConf(org.apache.hadoop.conf.Configuration initialConf, org.apache.hadoop.fs.Path matrixInputPath, org.apache.hadoop.fs.Path matrixOutputPath, int numInputRows)
static org.apache.hadoop.conf.Configuration	buildTransposeJobConf(org.apache.hadoop.fs.Path matrixInputPath, org.apache.hadoop.fs.Path matrixOutputPath, int numInputRows)
static void	main(String[] args)
int	run(String[] strings)

Methods inherited from class org.apache.mahout.common.AbstractJob

addFlag, addInputOption, addOption, addOption, addOption, addOption, addOutputOption, buildOption, buildOption, getAnalyzerClassFromOption, getCLIOption, getCombinedTempPath, getDimensions, getGroup, getInputFile, getInputPath, getOption, getOption, getOption, getOptions, getOutputFile, getOutputPath, getOutputPath, getTempPath, getTempPath, hasOption, keyFor, maybePut, parseArguments, parseArguments, parseDirectories, prepareJob, prepareJob, prepareJob, setConf, setS3SafeCombinedInputPath, shouldRunNextPhase

Methods inherited from class org.apache.hadoop.conf.Configured

getConf

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

Field Detail

NUM_ROWS_KEY

public static final String NUM_ROWS_KEY

See Also:

Constant Field Values

Constructor Detail

TransposeJob

public TransposeJob()

Method Detail

main

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

Throws:

Exception

run

public int run(String[] strings)
        throws Exception

Throws:

Exception

buildTransposeJobConf

public static org.apache.hadoop.conf.Configuration buildTransposeJobConf(org.apache.hadoop.fs.Path matrixInputPath,
                                                         org.apache.hadoop.fs.Path matrixOutputPath,
                                                         int numInputRows)
                                                                  throws IOException

Throws:

IOException

buildTransposeJobConf

public static org.apache.hadoop.conf.Configuration buildTransposeJobConf(org.apache.hadoop.conf.Configuration initialConf,
                                                         org.apache.hadoop.fs.Path matrixInputPath,
                                                         org.apache.hadoop.fs.Path matrixOutputPath,
                                                         int numInputRows)
                                                                  throws IOException

Throws:

IOException