net.sf.oriented.util.matrix

Class RationalMatrix

java.lang.Object

net.sf.oriented.util.matrix.RationalMatrix

public class RationalMatrix
extends Object

A class implementing matrixes of rationals via FieldMatrix and PerisicField. This class mainly exists to encapsulate computation of the determinant.

Author:

jeremycarroll

Constructor Summary

Constructors

Constructor and Description
RationalMatrix(FieldMatrix<PerisicFieldElement> delegate) Wraps a delegate.
RationalMatrix(int[][] data) Initialize a matrix from integers.
RationalMatrix(List<List<PerisicFieldElement>> data) Initialize a matrix from lists of lists of PerisicFieldElement.

Method Summary

Methods

Modifier and Type	Method and Description
PerisicFieldElement	determinantFromColumns(int[] columns) Computes the determinant on the sub-matrix formed by the specified columns
FieldMatrix<PerisicFieldElement>	getDelegate() Access the underlying FieldMatrix
int	height() The height or number of rows of the matrix.
String	toString()
int	width() The width or number of columns of the matrix.

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

RationalMatrix

public RationalMatrix(int[][] data)

Initialize a matrix from integers.

RationalMatrix

public RationalMatrix(FieldMatrix<PerisicFieldElement> delegate)

Wraps a delegate.

RationalMatrix

public RationalMatrix(List<List<PerisicFieldElement>> data)

Initialize a matrix from lists of lists of PerisicFieldElement.

Method Detail

height

public int height()

The height or number of rows of the matrix.

width

public int width()

The width or number of columns of the matrix.

toString

public String toString()

Overrides:

toString in class Object

determinantFromColumns

public PerisicFieldElement determinantFromColumns(int[] columns)

Computes the determinant on the sub-matrix formed by the specified columns

Parameters:

columns - A list of height() column numbers

Returns:

The determinant

getDelegate

public FieldMatrix<PerisicFieldElement> getDelegate()

Access the underlying FieldMatrix