drasys.or.matrix
Class CompressedMatrix

java.lang.Object
  |
  +--drasys.or.matrix.RealContainer
        |
        +--drasys.or.matrix.Matrix
              |
              +--drasys.or.matrix.CompressedMatrix

Direct Known Subclasses:

CompressedColumnMatrix, CompressedRowMatrix

public abstract class CompressedMatrix

extends Matrix

implements SizableMatrixI

Abstract base class for compressed matrices. A compressed matrix is a sparse matrix which stores only the non-null elements in the matrix. The values are stored in a single memory block and three additional memory blocks are used to store integer indices.

References:

Matrix Computations (Johns Hopkins Studies in the Mathematical Sciences)
    Gene H. Golub, Charles F. Van Loan (Contributor) / Paperback / Published 1996
Numerical Recipes in C : The Art of Scientific Computing
    William H. Press, et al / Hardcover / Published 1993
Parallel Algorithms for Matrix Computations
    K.A. Gallivan / Paperback / Published 1990

See Also:

Serialized Form

Fields inherited from class drasys.or.matrix.RealContainer

_epsilon, _globalEpsilon

 

Constructor Summary

CompressedMatrix()

CompressedMatrix(double epsilon)

CompressedMatrix(double[][] array)

CompressedMatrix(double[][] array, double epsilon)

 

Method Summary
double[]	getValueArray()           Returns the internal array that is used to hold the element values.
void	setCapacityOfElements(int capacityOfElements)           Allocates memory so the matrix can hold this many elements without reallocating memory.
void	setElements(double value)           Sets the value of all the non-null elements.
int	sizeOfColumns()           Returns the number of columns in the matrix.
int	sizeOfRows()           Returns the number of rows in the matrix.

 

Methods inherited from class drasys.or.matrix.Matrix

columnElements, elements, equals, equals, getArray, rowElements, setColumn, setDiagonal, setElements, setRow, sum, sum, sum, sumOfSquaredDifferences, sumOfSquaredDifferences, sumOfSquaredDifferences, sumOfSquares, sumOfSquares, sumOfSquares, toString

 

Methods inherited from class drasys.or.matrix.RealContainer

equals, getEpsilon, getGlobalEpsilon, setEpsilon, setGlobalEpsilon

 

Methods inherited from class java.lang.Object

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

 

Constructor Detail

CompressedMatrix

public CompressedMatrix()

CompressedMatrix

public CompressedMatrix(double epsilon)

CompressedMatrix

public CompressedMatrix(double[][] array,
                        double epsilon)

CompressedMatrix

public CompressedMatrix(double[][] array)

setCapacityOfElements

public void setCapacityOfElements(int capacityOfElements)

Allocates memory so the matrix can hold this many elements without reallocating memory.

setElements

public void setElements(double value)

Sets the value of all the non-null elements.

getValueArray

public double[] getValueArray()

Returns the internal array that is used to hold the element values.

sizeOfRows

public int sizeOfRows()

Returns the number of rows in the matrix.

sizeOfColumns

public int sizeOfColumns()

Returns the number of columns in the matrix.