mp
Class MPSimpleMatrix

java.lang.Object
  mp.MPDictionary
      mp.MPSimpleMatrix

public class MPSimpleMatrix

extends MPDictionary

This class is a simple matrix implementation of the MPDictionary superclass. In fact, it is as simple as possible and only the necessary methods are implemented. The dictionary is represented columnwise as a matrix D of size N×K, i.e. as a length K array of column vectors, each is a length N array.

Constructor Summary

MPSimpleMatrix(int iN, int iK, double[] val)
Constructs a N×K matrix or dictionary with values from given one-dimensional array (which represents the matrix).

Method Summary

double	getValue(int n, int k) Returns an entry of the matrix, i.e. a single entry of a dictionary element (atom).
void	setValue(int n, int k, double val) Set an entry (a value) in the dictionary.

Methods inherited from class mp.MPDictionary

addColumn, getColumn, getColumn, getColumns, getK, getN, getRow, getRow, getRows, innerProduct, isNormalized, multiply, multiply, normalize, setColumn, setRow, transposeMultiply, transposeMultiply

Methods inherited from class java.lang.Object

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

Constructor Detail

MPSimpleMatrix

public MPSimpleMatrix(int iN,
                      int iK,
                      double[] val)

Constructs a N×K matrix or dictionary with values from given one-dimensional array (which represents the matrix). Length of the array should be N*K.

Parameters:

iN - length of dictionary elements, i.e. column vectors of the matrix

iK - number of dictionary elements

val - the values (ordered by column, i.e. by dictionary elements)

Method Detail

getValue

public double getValue(int n,
                       int k)

Returns an entry of the matrix, i.e. a single entry of a dictionary element (atom). Note that the row, i.e. position in the column, is given first, the second argument is the column number i.e. the number of the dictionary atom. We should have: 0 <= n < N and 0 <= k < K. If any argument is outside legal range 0.0 is returned without error or warning.

Specified by:

getValue in class MPDictionary

Parameters:

n - row number for the returned entry value.

k - column number for the returned entry value.

setValue

public void setValue(int n,
                     int k,
                     double val)

Set an entry (a value) in the dictionary. Note that the row, i.e. position in the column, is given first, the second argument is the column number i.e. the number of the dictionary atom. We should have: 0 <= n < N and 0 <= k < K. If any argument is outside legal range nothing is done.

Specified by:

setValue in class MPDictionary

Parameters:

n - row number for the entry value to be changed.

k - column number for the entry value to be changed.

val - the value to be put into the given entry of the dictionary.