org.apache.mahout.math.hadoop.decomposer

Class HdfsBackedLanczosState

java.lang.Object

org.apache.mahout.math.decomposer.lanczos.LanczosState

org.apache.mahout.math.hadoop.decomposer.HdfsBackedLanczosState

All Implemented Interfaces:

org.apache.hadoop.conf.Configurable

public class HdfsBackedLanczosState
extends LanczosState
implements org.apache.hadoop.conf.Configurable

Field Summary

Fields

Modifier and Type	Field and Description
static String	BASIS_PREFIX
static String	SINGULAR_PREFIX

Fields inherited from class org.apache.mahout.math.decomposer.lanczos.LanczosState

basis, corpus, desiredRank, diagonalMatrix, iterationNumber, scaleFactor, singularValues, singularVectors

Constructor Summary

Constructors

Constructor and Description
HdfsBackedLanczosState(VectorIterable corpus, int desiredRank, Vector initialVector, org.apache.hadoop.fs.Path dir)

Method Summary

Modifier and Type	Method and Description
protected Vector	fetchVector(org.apache.hadoop.fs.Path p, int keyIndex)
Vector	getBasisVector(int i)
org.apache.hadoop.conf.Configuration	getConf()
Matrix	getDiagonalMatrix()
Vector	getRightSingularVector(int i)
double	getScaleFactor()
protected void	persistVector(org.apache.hadoop.fs.Path p, int key, Vector vector)
void	setConf(org.apache.hadoop.conf.Configuration configuration)
void	setIterationNumber(int i)
protected void	updateHdfsState()

Methods inherited from class org.apache.mahout.math.decomposer.lanczos.LanczosState

getBasisSize, getCorpus, getIterationNumber, getSingularValue, setBasisVector, setRightSingularVector, setScaleFactor, setSingularValue

Methods inherited from class java.lang.Object

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

Field Detail

BASIS_PREFIX

public static final String BASIS_PREFIX

See Also:

Constant Field Values

SINGULAR_PREFIX

public static final String SINGULAR_PREFIX

See Also:

Constant Field Values

Constructor Detail

HdfsBackedLanczosState

public HdfsBackedLanczosState(VectorIterable corpus,
                              int desiredRank,
                              Vector initialVector,
                              org.apache.hadoop.fs.Path dir)

Method Detail

setConf

public void setConf(org.apache.hadoop.conf.Configuration configuration)

Specified by:

setConf in interface org.apache.hadoop.conf.Configurable

getConf

public org.apache.hadoop.conf.Configuration getConf()

Specified by:

getConf in interface org.apache.hadoop.conf.Configurable

setIterationNumber

public void setIterationNumber(int i)

Overrides:

setIterationNumber in class LanczosState

updateHdfsState

protected void updateHdfsState()
                        throws IOException

Throws:

IOException

persistVector

protected void persistVector(org.apache.hadoop.fs.Path p,
                             int key,
                             Vector vector)
                      throws IOException

Throws:

IOException

fetchVector

protected Vector fetchVector(org.apache.hadoop.fs.Path p,
                             int keyIndex)
                      throws IOException

Throws:

IOException

getBasisVector

public Vector getBasisVector(int i)

Overrides:

getBasisVector in class LanczosState

getRightSingularVector

public Vector getRightSingularVector(int i)

Overrides:

getRightSingularVector in class LanczosState

getScaleFactor

public double getScaleFactor()

Overrides:

getScaleFactor in class LanczosState

getDiagonalMatrix

public Matrix getDiagonalMatrix()

Overrides:

getDiagonalMatrix in class LanczosState