gov.llnl.ontology.util
Class MahoutSparseVector

java.lang.Object
  org.apache.mahout.math.AbstractVector
      gov.llnl.ontology.util.MahoutSparseVector

All Implemented Interfaces:

Cloneable, Iterable<org.apache.mahout.math.Vector.Element>, org.apache.mahout.math.Vector

public class MahoutSparseVector
extends org.apache.mahout.math.AbstractVector

A wrapper around an S-Space SparseDoubleVector into the Mahout style vector.

Author:

Keith Stevens

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.mahout.math.AbstractVector

org.apache.mahout.math.AbstractVector.LocalElement

Nested classes/interfaces inherited from interface org.apache.mahout.math.Vector

org.apache.mahout.math.Vector.Element

Field Summary

Fields inherited from class org.apache.mahout.math.AbstractVector

lengthSquared

Constructor Summary

MahoutSparseVector(edu.ucla.sspace.vector.SparseDoubleVector vector)
Creates a new MahoutSparseVector from a SparseDoubleVector.

MahoutSparseVector(edu.ucla.sspace.vector.SparseDoubleVector vector, int length)
Creates a MahoutSparseVector from a given SparseDoubleVector with the given length.

Method Summary

int	getNumNondefaultElements()
double	getQuick(int index)
boolean	isDense()
boolean	isSequentialAccess()
Iterator<org.apache.mahout.math.Vector.Element>	iterateNonZero()
Iterator<org.apache.mahout.math.Vector.Element>	iterator()
org.apache.mahout.math.Vector	like()
org.apache.mahout.math.Matrix	matrixLike(int rows, int columns)
void	setQuick(int index, double value)

Methods inherited from class org.apache.mahout.math.AbstractVector

addTo, aggregate, aggregate, asFormatString, assign, assign, assign, assign, assign, assign, clone, cross, divide, dot, dotSelf, equals, get, getDistanceSquared, getElement, getLengthSquared, hashCode, logNormalize, logNormalize, logNormalize, maxValue, maxValueIndex, minus, minValue, minValueIndex, norm, normalize, normalize, plus, plus, set, size, times, times, toString, viewPart, zSum

Methods inherited from class java.lang.Object

finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

MahoutSparseVector

public MahoutSparseVector(edu.ucla.sspace.vector.SparseDoubleVector vector)

Creates a new MahoutSparseVector from a SparseDoubleVector. The length will be either vector's length, if it is not Integer.MAX_VALUE. Otherwise it will be the last index in the non zero indices array.

MahoutSparseVector

public MahoutSparseVector(edu.ucla.sspace.vector.SparseDoubleVector vector,
                          int length)

Creates a MahoutSparseVector from a given SparseDoubleVector with the given length. length must be less than the maximum length of vector.

Method Detail

matrixLike

public org.apache.mahout.math.Matrix matrixLike(int rows,
                                                int columns)

Specified by:

matrixLike in class org.apache.mahout.math.AbstractVector

getNumNondefaultElements

public int getNumNondefaultElements()

setQuick

public void setQuick(int index,
                     double value)

getQuick

public double getQuick(int index)

like

public org.apache.mahout.math.Vector like()

iterateNonZero

public Iterator<org.apache.mahout.math.Vector.Element> iterateNonZero()

iterator

public Iterator<org.apache.mahout.math.Vector.Element> iterator()

isSequentialAccess

public boolean isSequentialAccess()

isDense

public boolean isDense()