org.spaceroots.mantissa.linalg
Class GeneralMatrix

java.lang.Object
  org.spaceroots.mantissa.linalg.Matrix
      org.spaceroots.mantissa.linalg.GeneralMatrix

All Implemented Interfaces:

Serializable

public class GeneralMatrix

extends Matrix

This class represents matrices of the most general type.

This class is the basic implementation of matrices to use when nothing special is known about the structure of the matrix.

Version:

$Id: GeneralMatrix.java 1709 2006-12-03 21:16:50Z luc $

Author:

L. Maisonobe

See Also:

Serialized Form

Field Summary

Fields inherited from class org.spaceroots.mantissa.linalg.Matrix

columns, data, rows

Constructor Summary

GeneralMatrix(int rows, int columns)
Simple constructor.

GeneralMatrix(int rows, int columns, double[] data)
Simple constructor.

GeneralMatrix(Matrix m)
Copy constructor.

Method Summary

Matrix	duplicate() Polymorphic copy operator.
protected org.spaceroots.mantissa.linalg.NonNullRange	getRangeForColumn(int j) Set a range to the non null part covered by a column.
protected org.spaceroots.mantissa.linalg.NonNullRange	getRangeForRow(int i) Set a range to the non null part covered by a row.
void	selfAdd(Matrix m) Add a matrix to the instance.
void	selfSub(Matrix m) Substract a matrix from the instance.

Methods inherited from class org.spaceroots.mantissa.linalg.Matrix

add, getColumns, getElement, getRows, getTranspose, mul, mul, selfMul, setElement, sub, toString

Methods inherited from class java.lang.Object

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

Constructor Detail

GeneralMatrix

public GeneralMatrix(int rows,
                     int columns)

Simple constructor. Build a matrix with null elements.

Parameters:

rows - number of rows of the matrix

columns - number of columns of the matrix

GeneralMatrix

public GeneralMatrix(int rows,
                     int columns,
                     double[] data)

Simple constructor. Build a matrix with specified elements.

Parameters:

rows - number of rows of the matrix

columns - number of columns of the matrix

data - table of the matrix elements (stored row after row)

GeneralMatrix

public GeneralMatrix(Matrix m)

Copy constructor.

Parameters:

m - matrix to copy

Method Detail

duplicate

public Matrix duplicate()

Description copied from class: Matrix

Polymorphic copy operator. This method build a new object of the same type of the instance. It is somewhat similar to the Object.clone() method, except that it has public access, it doesn't throw any specific exception and it returns a Matrix.

Specified by:

duplicate in class Matrix

See Also:

Object.clone()

selfAdd

public void selfAdd(Matrix m)

Add a matrix to the instance. This method adds a matrix to the instance. It does modify the instance.

Parameters:

m - matrix to add

Throws:

IllegalArgumentException - if there is a dimension mismatch

selfSub

public void selfSub(Matrix m)

Substract a matrix from the instance. This method substracts a matrix from the instance. It does modify the instance.

Parameters:

m - matrix to substract

Throws:

IllegalArgumentException - if there is a dimension mismatch

getRangeForRow

protected org.spaceroots.mantissa.linalg.NonNullRange getRangeForRow(int i)

Description copied from class: Matrix

Set a range to the non null part covered by a row.

Specified by:

getRangeForRow in class Matrix

Parameters:

i - index of the row

Returns:

range of non nul elements in the specified row

See Also:

Matrix.getRangeForColumn(int)

getRangeForColumn

protected org.spaceroots.mantissa.linalg.NonNullRange getRangeForColumn(int j)

Description copied from class: Matrix

Set a range to the non null part covered by a column.

Specified by:

getRangeForColumn in class Matrix

Parameters:

j - index of the column

Returns:

range of non nul elements in the specified column

See Also:

Matrix.getRangeForRow(int)