JSci.maths.matrices
Class DoubleFileSquareMatrix

java.lang.Object
  JSci.maths.matrices.Matrix
      JSci.maths.matrices.AbstractDoubleMatrix
          JSci.maths.matrices.AbstractDoubleSquareMatrix
              JSci.maths.matrices.DoubleFileSquareMatrix

All Implemented Interfaces:

java.io.Serializable, Algebra.Member, Module.Member, VectorSpace.Member, Ring.Member, AbelianGroup.Member, SquareMatrix, Member

public class DoubleFileSquareMatrix
extends AbstractDoubleSquareMatrix

Uses an underlying file as storage.

See Also:

Serialized Form

Field Summary

Fields inherited from class JSci.maths.matrices.AbstractDoubleSquareMatrix

luCache

Fields inherited from class JSci.maths.matrices.Matrix

numCols, numRows

Constructor Summary

DoubleFileSquareMatrix(double[][] array)

DoubleFileSquareMatrix(int size)

DoubleFileSquareMatrix(int size, java.io.File f, int numBuffers, boolean bufferDiag)

DoubleFileSquareMatrix(int size, java.lang.String filename, int numBuffers, boolean bufferDiag)

Method Summary

void	close()
double	getElement(int i, int j) Returns an element of the matrix.
void	setElement(int i, int j, double x) Sets the value of an element of the matrix.

Methods inherited from class JSci.maths.matrices.AbstractDoubleSquareMatrix

add, add, choleskyDecompose, det, directSum, inverse, isSymmetric, isUnitary, luDecompose_cache, luDecompose, luDecompose, mapElements, multiply, negate, operatorNorm, polarDecompose, qrDecompose, scalarDivide, scalarMultiply, scalarProduct, scalarProduct, singularValueDecompose, subtract, subtract, tensor, toComplexMatrix, toIntegerMatrix, trace, transpose

Methods inherited from class JSci.maths.matrices.AbstractDoubleMatrix

add, directSum, equals, equals, equals, frobeniusNorm, getSet, hashCode, infNorm, multiply, multiply, multiply, scalarDivide, scalarMultiply, subtract, tensor, toString

Methods inherited from class JSci.maths.matrices.Matrix

columns, getInvalidElementMsg, rows

Methods inherited from class java.lang.Object

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

Constructor Detail

DoubleFileSquareMatrix

public DoubleFileSquareMatrix(int size,
                              java.io.File f,
                              int numBuffers,
                              boolean bufferDiag)
                       throws java.io.IOException

Parameters:

numBuffers - number of row buffers

Throws:

java.io.IOException

DoubleFileSquareMatrix

public DoubleFileSquareMatrix(int size,
                              java.lang.String filename,
                              int numBuffers,
                              boolean bufferDiag)
                       throws java.io.IOException

Throws:

java.io.IOException

DoubleFileSquareMatrix

public DoubleFileSquareMatrix(int size)
                       throws java.io.IOException

Throws:

java.io.IOException

DoubleFileSquareMatrix

public DoubleFileSquareMatrix(double[][] array)
                       throws java.io.IOException

Throws:

java.io.IOException

Method Detail

getElement

public double getElement(int i,
                         int j)

Description copied from class: AbstractDoubleMatrix

Returns an element of the matrix.

Specified by:

getElement in class AbstractDoubleMatrix

Parameters:

i - row index of the element

j - column index of the element

setElement

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

Description copied from class: AbstractDoubleMatrix

Sets the value of an element of the matrix. Should only be used to initialise this matrix.

Specified by:

setElement in class AbstractDoubleMatrix

Parameters:

i - row index of the element

j - column index of the element

x - a number

close

public void close()
           throws java.io.IOException

Throws:

java.io.IOException