org.apache.mahout.math

Class DenseSymmetricMatrix

java.lang.Object

org.apache.mahout.math.AbstractMatrix

org.apache.mahout.math.UpperTriangular

org.apache.mahout.math.DenseSymmetricMatrix

All Implemented Interfaces:

Cloneable, Iterable<MatrixSlice>, Matrix, VectorIterable

public class DenseSymmetricMatrix
extends UpperTriangular

Economy packaging for a dense symmetric in-core matrix.

Nested Class Summary

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

AbstractMatrix.TransposeViewVector

Field Summary

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

COL, columnLabelBindings, columns, ROW, rowLabelBindings, rows

Constructor Summary

Constructors

Constructor and Description
DenseSymmetricMatrix(double[] data, boolean shallow)
DenseSymmetricMatrix(int n)
DenseSymmetricMatrix(UpperTriangular mx)
DenseSymmetricMatrix(Vector data)

Method Summary

Methods

Modifier and Type	Method and Description
double	getQuick(int row, int column) Return the value at the given indexes, without checking bounds
void	setQuick(int row, int column, double value) Set the value at the given index, without checking bounds

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

assignColumn, assignNonZeroElementsInRow, assignRow, getData, getFlavor, getNumNondefaultElements, like, like, viewPart

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

aggregate, aggregateColumns, aggregateRows, asFormatString, assign, assign, assign, assign, assign, clone, columnSize, determinant, divide, get, get, getColumnLabelBindings, getRowLabelBindings, iterateAll, iterateNonEmpty, iterator, minus, numCols, numRows, numSlices, plus, plus, rowSize, set, set, set, set, set, set, setColumnLabelBindings, setRowLabelBindings, times, times, times, timesSquared, toString, transpose, viewColumn, viewDiagonal, viewPart, viewRow, zSum

Methods inherited from class java.lang.Object

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

Constructor Detail

DenseSymmetricMatrix

public DenseSymmetricMatrix(int n)

DenseSymmetricMatrix

public DenseSymmetricMatrix(double[] data,
                    boolean shallow)

DenseSymmetricMatrix

public DenseSymmetricMatrix(Vector data)

DenseSymmetricMatrix

public DenseSymmetricMatrix(UpperTriangular mx)

Method Detail

getQuick

public double getQuick(int row,
              int column)

Description copied from interface: Matrix

Return the value at the given indexes, without checking bounds

Specified by:

getQuick in interface Matrix

Overrides:

getQuick in class UpperTriangular

Parameters:

row - an int row index

column - an int column index

Returns:

the double at the index

setQuick

public void setQuick(int row,
            int column,
            double value)

Description copied from interface: Matrix

Set the value at the given index, without checking bounds

Specified by:

setQuick in interface Matrix

Overrides:

setQuick in class UpperTriangular

Parameters:

row - an int row index into the receiver

column - an int column index into the receiver

value - a double value to set