jsci.util.array
Class SparseDoubleArray2D

java.lang.Object
  jsci.util.array.AbstractDoubleArray2D
      jsci.util.array.SparseDoubleArray2D

All Implemented Interfaces:

Array2D<java.lang.Double>, DoubleArray2D

Direct Known Subclasses:

AlgorithmsSparseDoubleArray2D

public class SparseDoubleArray2D
extends AbstractDoubleArray2D

Field Summary

protected int	capacityIncrement Amount by which to increase the capacity.
protected int[]	colPos Sparse indexing data.
protected double[]	elements Matrix elements.
protected int	numCols
protected int	numRows
protected int[]	rows Sparse indexing data.
protected double	zeroTol

Constructor Summary

SparseDoubleArray2D(double[][] array)

SparseDoubleArray2D(double[][] array, double zeroTol, int capacityIncrement)

SparseDoubleArray2D(int rowCount, int colCount)

SparseDoubleArray2D(int rowCount, int colCount, double zeroTol, int capacityIncrement)

Method Summary

void	addTo(int i, int j, double delta)
int	columns()
SparseDoubleArray2D	create(int rows, int cols)
double	getDouble(int i, int j)
int	getElementCount()
int	rows()
void	setDouble(int i, int j, double x)

Methods inherited from class jsci.util.array.AbstractDoubleArray2D

contentEquals, contentEquals, contentEquals, contentEqualsOp, contentEqualsOp, get, set, toString

Methods inherited from class java.lang.Object

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

Field Detail

numRows

protected final int numRows

numCols

protected final int numCols

zeroTol

protected final double zeroTol

elements

protected double[] elements

Matrix elements.

colPos

protected int[] colPos

Sparse indexing data. Contains the column positions of each element, e.g. colPos[n] is the column position of the nth element.

rows

protected final int[] rows

Sparse indexing data. Contains the indices of the start of each row, e.g. rows[i] is the index where the ith row starts.

capacityIncrement

protected final int capacityIncrement

Amount by which to increase the capacity.

Constructor Detail

SparseDoubleArray2D

public SparseDoubleArray2D(int rowCount,
                           int colCount)

SparseDoubleArray2D

public SparseDoubleArray2D(int rowCount,
                           int colCount,
                           double zeroTol,
                           int capacityIncrement)

SparseDoubleArray2D

public SparseDoubleArray2D(double[][] array)

SparseDoubleArray2D

public SparseDoubleArray2D(double[][] array,
                           double zeroTol,
                           int capacityIncrement)

Method Detail

create

public SparseDoubleArray2D create(int rows,
                                  int cols)

getDouble

public double getDouble(int i,
                        int j)

setDouble

public void setDouble(int i,
                      int j,
                      double x)

addTo

public void addTo(int i,
                  int j,
                  double delta)

rows

public int rows()

columns

public int columns()

getElementCount

public int getElementCount()