ch.akuhn.matrix

Class DenseMatrix

java.lang.Object

ch.akuhn.matrix.Matrix

ch.akuhn.matrix.DenseMatrix

Direct Known Subclasses:

SymmetricMatrix

public class DenseMatrix
extends Matrix

A Dense matrix.

Author:

Adrian Kuhn

Field Summary

Fields

Modifier and Type	Field and Description
protected double[][]	values

Constructor Summary

Constructors

Constructor and Description
DenseMatrix(double[][] values) Construct with the given values
DenseMatrix(int rows, int columns) Construct with the given size

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) Inline multiplication by a constant
protected void	assertInvariant()
int	columnCount() Get the number of columns
void	fill(double constant) Fill with a constant
double	get(int row, int column)
protected double[][]	makeValues(int rows, int columns)
Matrix	newInstance(int rows, int cols)
double	put(int row, int column, double value) Set the value at the given row/column
int	rowCount()
Iterable<Vector>	rows() Get an Iterable over the rows
double[][]	unwrap()
int	used()

Methods inherited from class ch.akuhn.matrix.Matrix

asArray, asColumnMajorArray, column, columns, dense, density, elementCount, from, getHistogram, indexOf, isSquare, max, mean, min, mult, newInstance, row, 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

values

protected double[][] values

Constructor Detail

DenseMatrix

public DenseMatrix(double[][] values)

Construct with the given values

Parameters:

values - the values

DenseMatrix

public DenseMatrix(int rows,
                   int columns)

Construct with the given size

Parameters:

rows -

columns -

Method Detail

assertInvariant

protected void assertInvariant()
                        throws IllegalArgumentException

Throws:

IllegalArgumentException

makeValues

protected double[][] makeValues(int rows,
                                int columns)

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

rows

public Iterable<Vector> rows()

Description copied from class: Matrix

Get an Iterable over the rows

Overrides:

rows in class Matrix

Returns:

an Iterable over the rows

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 with a constant

Parameters:

constant -

applyMultiplication

public void applyMultiplication(double d)

Inline multiplication by a constant

Parameters:

d -

newInstance

public Matrix newInstance(int rows,
                          int cols)

Specified by:

newInstance in class Matrix

Returns:

an empty instance of this matrix type