org.openimaj.math.matrix

Class JamaDenseMatrix

java.lang.Object

ch.akuhn.matrix.Matrix

org.openimaj.math.matrix.JamaDenseMatrix

public class JamaDenseMatrix
extends Matrix

Dense matrix wrapper for a JAMA matrix.

Author:

Jonathon Hare (jsh2@ecs.soton.ac.uk)

Field Summary

Fields

Modifier and Type	Field and Description
Jama.Matrix	matrix The underlying matrix

Constructor Summary

Constructors

Constructor and Description
JamaDenseMatrix(double[][] values) Construct with 2d array of data.
JamaDenseMatrix(int rows, int columns) Construct with given dimensions.
JamaDenseMatrix(Jama.Matrix matrix) Construct with matrix.

Method Summary

Modifier and Type	Method and Description
double	add(int row, int column, double value) Add to the value at the given row/column
void	applyMultiplication(double d) Multiply all elements by a constant.
double[][]	asArray() Get the matrix data as a 2D dense array
protected void	assertInvariant()
int	columnCount() Get the number of columns
void	fill(double constant) Fill the elements with a constant value.
double	get(int row, int column)
Jama.Matrix	getMatrix()
Matrix	newInstance(int rows, int cols)
double	put(int row, int column, double value) Set the value at the given row/column
int	rowCount()
double[][]	unwrap()
int	used()

Methods inherited from class ch.akuhn.matrix.Matrix

asColumnMajorArray, column, columns, dense, density, elementCount, from, getHistogram, indexOf, isSquare, max, mean, min, mult, newInstance, row, rows, rowwiseMean, sparse, storeSparseOn, storeSparseOn, toString, transposeMultiply, transposeNonTransposeMultiply

Methods inherited from class java.lang.Object

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

Field Detail

matrix

public Jama.Matrix matrix

The underlying matrix

Constructor Detail

JamaDenseMatrix

public JamaDenseMatrix(Jama.Matrix matrix)

Construct with matrix. The matrix is retained.

Parameters:

matrix - The matrix.

JamaDenseMatrix

public JamaDenseMatrix(double[][] values)

Construct with 2d array of data.

Parameters:

values - The data.

JamaDenseMatrix

public JamaDenseMatrix(int rows,
                       int columns)

Construct with given dimensions.

Parameters:

rows - number of rows.

columns - number of columns.

Method Detail

assertInvariant

protected void assertInvariant()
                        throws IllegalArgumentException

Throws:

IllegalArgumentException

add

public double add(int row,
                  int column,
                  double value)

Description copied from class: Matrix

Add to the value at the given row/column

Overrides:

add in class Matrix

Returns:

the new value

columnCount

public int columnCount()

Description copied from class: Matrix

Get the number of columns

Specified by:

columnCount in class Matrix

Returns:

the number of columns

get

public double get(int row,
                  int column)

Specified by:

get in class Matrix

Returns:

the value at the given row and column

put

public double put(int row,
                  int column,
                  double value)

Description copied from class: Matrix

Set the value at the given row/column

Specified by:

put in class Matrix

Returns:

the value being set

rowCount

public int rowCount()

Specified by:

rowCount in class Matrix

Returns:

the number of rows

used

public int used()

Specified by:

used in class Matrix

Returns:

the number of non-zero elements

unwrap

public double[][] unwrap()

Overrides:

unwrap in class Matrix

Returns:

unwrapped matrix

fill

public void fill(double constant)

Fill the elements with a constant value.

Parameters:

constant - the value to set the elements to.

applyMultiplication

public void applyMultiplication(double d)

Multiply all elements by a constant.

Parameters:

d - the multiplication factor.

getMatrix

public Jama.Matrix getMatrix()

Returns:

the wrapped JAMA matrix

asArray

public double[][] asArray()

Description copied from class: Matrix

Get the matrix data as a 2D dense array

Overrides:

asArray in class Matrix

Returns:

the array representation

newInstance

public Matrix newInstance(int rows,
                          int cols)

Specified by:

newInstance in class Matrix

Returns:

an empty instance of this matrix type