boone.util

Class JamaHelper

java.lang.Object

boone.util.JamaHelper

public final class JamaHelper
extends java.lang.Object

Helper for Jama related computations.

Since:

Wed 2004-06-16

Author:

Helmut A. Mayer

Constructor Summary

Constructors

Constructor and Description
JamaHelper()

Method Summary

Modifier and Type	Method and Description
static Jama.Matrix	createRowMatrix(PatternSet patterns) Create a matrix from the given patterns, where each row is an input pattern.
static Jama.Matrix	getColumnMean(Jama.Matrix m) Calculate mean of column vectors.
static Jama.Matrix	getColumnVector(Jama.Matrix m, int index) Returns the column vector of given index.
static Jama.Matrix	getRowMean(Jama.Matrix m) Calculate mean of row vectors.
static Jama.Matrix	getRowVector(Jama.Matrix m, int index) Returns the row vector of given index.
static void	normalize(Jama.Matrix m) Normalizes the matrix using the Frobenius norm.

Methods inherited from class java.lang.Object

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

Constructor Detail

JamaHelper

public JamaHelper()

Method Detail

createRowMatrix

public static Jama.Matrix createRowMatrix(PatternSet patterns)

Create a matrix from the given patterns, where each row is an input pattern.

Parameters:

patterns - a pattern set

Returns:

a matrix with input patterns in rows

getRowMean

public static Jama.Matrix getRowMean(Jama.Matrix m)

Calculate mean of row vectors. The result is a row vector.

Parameters:

m - a matrix

Returns:

the mean of the row vectors as a new row vector

getColumnMean

public static Jama.Matrix getColumnMean(Jama.Matrix m)

Calculate mean of column vectors. The result is a column vector.

Parameters:

m - a matrix

Returns:

the mean of the column vectors as a new column vector

getRowVector

public static Jama.Matrix getRowVector(Jama.Matrix m,
                                       int index)

Returns the row vector of given index.

Parameters:

m - a matrix

index - the row index

Returns:

the row vector

getColumnVector

public static Jama.Matrix getColumnVector(Jama.Matrix m,
                                          int index)

Returns the column vector of given index.

Parameters:

m - a matrix

index - the column index

Returns:

the column vector

normalize

public static void normalize(Jama.Matrix m)

Normalizes the matrix using the Frobenius norm. In case of a vector this gives a (euclidean) unit vector.

Parameters:

m - a matrix