Package edu.cmu.tetrad.util

Class IndexedMatrix

java.lang.Object

edu.cmu.tetrad.util.IndexedMatrix

public final class IndexedMatrix
extends Object

Indexed matrix.

Version:

$Id: $Id

Author:

josephramsey Returns values of the given square matrix, where the indices are remapped via the given indices array. If the supplied matrix is 6 x 6, for example, and the indices set are [5 4 2 1], then getValue(1, 2) will return element [4][2] of the given matrix.

Constructor Summary

Constructors

Constructor	Description
IndexedMatrix(double[][] matrix)	Constructs a new IndexedMatrix for the given matrix.

Method Summary

Modifier and Type	Method	Description
int[]	getIndices()	Getter for the field indices.
double	getValue(int i, int j)	getValue.
void	setIndices(int[] indices)	Sets the index array.

Methods inherited from class java.lang.Object

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

Constructor Details

IndexedMatrix

public IndexedMatrix(double[][] matrix)

Constructs a new IndexedMatrix for the given matrix.

Parameters:

matrix - The wrapped matrix.

Method Details

getIndices

public int[] getIndices()

Getter for the field indices.

Returns:

Ibid.

setIndices

public void setIndices(int[] indices)

Sets the index array. The index array must be of length <= the order of the matrix, each element of which is distinct and < the order of the matrix.

Parameters:

indices - The indices of the submatrix desired.

getValue

public double getValue(int i,
 int j)

getValue.

Parameters:

i - The row value in the remapped indices of the cell desired.

j - The column value in teh remapped indices of the cell desired.

Returns:

Ibid.