drasys.or.matrix
Class FunctionMatrix

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

Direct Known Subclasses:

PolynomialMatrix, QuadraticMatrix

public abstract class FunctionMatrix

extends Matrix

implements MatrixI

A matrix that computes some or all of the elements with the abstract method 'functionElementAt' that must be defined in a subclass. It is typically used to extend the rows or columns of a matrix with computations based on the exsisting rows and columns. The subclass constructor must set the two inherited variables '_sizeOfRows' and '_sizeOfColumns'.

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

Field Summary
protected  int	_sizeOfColumns
protected  int	_sizeOfRows

 

Fields inherited from class drasys.or.matrix.RealContainer

_epsilon, _globalEpsilon

 

Constructor Summary

FunctionMatrix()

 

Method Summary
double	elementAt(int row, int column)           Gets the value of the element at 'row' and 'column' by calling 'functionElementAt' after checking the validity of the indices.
abstract  double	functionElementAt(int row, int column)           Computes the value of the element at 'row' and 'column'.
boolean	isColumnMajor()           Returns the value from the underlying matrix.
boolean	isNull(int row, int column)           Returns the value from the underlying matrix if 'row' and 'column' are in its range.
boolean	isRowMajor()           Returns the value from the underlying matrix.
void	setElementAt(int row, int column, double value)           Sets the value in the underlying matrix if 'row' and 'column' are in its range.
void	setElements(double value)           Sets the value of all the non-null elements in the underlying matrix.
int	sizeOfColumns()           Returns the number of columns in the matrix.
int	sizeOfElements()           Returns the number of non-null elements 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

 

Field Detail

_sizeOfRows

protected int _sizeOfRows

_sizeOfColumns

protected int _sizeOfColumns

FunctionMatrix

public FunctionMatrix()

setElements

public void setElements(double value)

Sets the value of all the non-null elements in the underlying matrix.

Specified by:

setElements in interface MatrixI

sizeOfRows

public int sizeOfRows()

Returns the number of rows in the matrix.

Specified by:

sizeOfRows in interface MatrixI

sizeOfColumns

public int sizeOfColumns()

Returns the number of columns in the matrix.

Specified by:

sizeOfColumns in interface MatrixI

isNull

public boolean isNull(int row,
                      int column)

Returns the value from the underlying matrix if 'row' and 'column' are in its range. Otherwise; it returns 'false';

Specified by:

isNull in interface MatrixI

setElementAt

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

Sets the value in the underlying matrix if 'row' and 'column' are in its range. Otherwise; it has no effect.

Specified by:

setElementAt in interface MatrixI

sizeOfElements

public int sizeOfElements()

Returns the number of non-null elements in the matrix. The functional elements are all counted as non-null.

Specified by:

sizeOfElements in interface MatrixI

isRowMajor

public boolean isRowMajor()

Returns the value from the underlying matrix.

Specified by:

isRowMajor in interface MatrixI

isColumnMajor

public boolean isColumnMajor()

Returns the value from the underlying matrix.

Specified by:

isColumnMajor in interface MatrixI

elementAt

public double elementAt(int row,
                        int column)

Gets the value of the element at 'row' and 'column' by calling 'functionElementAt' after checking the validity of the indices.

Specified by:

elementAt in interface MatrixI

Tags copied from interface: MatrixI

Returns:

zero is the element is null

functionElementAt

public abstract double functionElementAt(int row,
                                         int column)

Computes the value of the element at 'row' and 'column'.