meka.core

Class M

java.lang.Object

meka.core.M

public abstract class M
extends java.lang.Object

M.java - Handy matrix operations (on 2D arrays[][])

Constructor Summary

Constructors

Constructor and Description
M()

Method Summary

Methods

Modifier and Type	Method and Description
static double[][]	abs(double[][] A)
static double[][]	addBias(double[][] M)
static Jama.Matrix	addBias(Jama.Matrix M)
static int[][]	deep_copy(int[][] M) Deep Copy - Make a deep copy of M[][].
static double	dsigma(double a) Derivative of the sigmoid function applied to scalar
static double[]	dsigma(double[] v) Derivative of the sigmoid function applied to vector
static double[][]	dsigma(double[][] A) Derivative of the sigmoid function applied to Matrix
static Jama.Matrix	dsigma(Jama.Matrix A) Derivative of the sigmoid function applied to Jama Matrix
static int[]	flatten(int[][] M) Flatten - turn Matrix [0 1; 2 3] into vector [0 1 2 3].
static double[]	getCol(double[][] M, int k) GetCol - return the k-th column of M (as a vector).
static int[]	getCol(int[][] M, int k) GetCol - return the k-th column of M (as a vector).
static double[][]	multiply(double[][] A, double K) Multiply - multiply each value in A[][] by constant K.
static double[][]	removeBias(double[][] M)
static double	sigma(double a) Sigmoid / Logistic function
static double[]	sigma(double[] v) Sigmoid function applied to vector
static double[][]	sigma(double[][] A) Sigmoid function applied to matrix (2D array)
static Jama.Matrix	sigma(Jama.Matrix A) Sigmoid function applied to Matrix
static double	SS(double[][] M)
static double[][]	subtract(double[][] A, double[][] B)
static double[][]	threshold(double[][] P, double t) Threshold - apply threshold t to matrix P[][].
static java.lang.String	toString(double[][] M_) ToString - return a String representation.
static java.lang.String	toString(double[][] M_, int adp) ToString - return a String representation (to adp decimal places).
static java.lang.String	toString(double[][] M, java.lang.String name) ToString - return a String representation of 'M', in Matlab format, called 'name'.
static java.lang.String	toString(int[][] M_) ToString - return a String representation.

Methods inherited from class java.lang.Object

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

Constructor Detail

M

public M()

Method Detail

getCol

public static double[] getCol(double[][] M,
              int k)

GetCol - return the k-th column of M (as a vector).

getCol

public static int[] getCol(int[][] M,
           int k)

GetCol - return the k-th column of M (as a vector).

addBias

public static double[][] addBias(double[][] M)

addBias

public static Jama.Matrix addBias(Jama.Matrix M)

removeBias

public static double[][] removeBias(double[][] M)

multiply

public static double[][] multiply(double[][] A,
                  double K)

Multiply - multiply each value in A[][] by constant K.

toString

public static java.lang.String toString(double[][] M_,
                        int adp)

ToString - return a String representation (to adp decimal places).

toString

public static java.lang.String toString(double[][] M_)

ToString - return a String representation.

toString

public static java.lang.String toString(int[][] M_)

ToString - return a String representation.

toString

public static java.lang.String toString(double[][] M,
                        java.lang.String name)

ToString - return a String representation of 'M', in Matlab format, called 'name'.

threshold

public static final double[][] threshold(double[][] P,
                   double t)

Threshold - apply threshold t to matrix P[][].

flatten

public static int[] flatten(int[][] M)

Flatten - turn Matrix [0 1; 2 3] into vector [0 1 2 3].

subtract

public static double[][] subtract(double[][] A,
                  double[][] B)

abs

public static double[][] abs(double[][] A)

SS

public static double SS(double[][] M)

sigma

public static final double sigma(double a)

Sigmoid / Logistic function

sigma

public static final double[] sigma(double[] v)

Sigmoid function applied to vector

sigma

public static final double[][] sigma(double[][] A)

Sigmoid function applied to matrix (2D array)

sigma

public static final Jama.Matrix sigma(Jama.Matrix A)

Sigmoid function applied to Matrix

dsigma

public static final double dsigma(double a)

Derivative of the sigmoid function applied to scalar

dsigma

public static final double[] dsigma(double[] v)

Derivative of the sigmoid function applied to vector

dsigma

public static final double[][] dsigma(double[][] A)

Derivative of the sigmoid function applied to Matrix

dsigma

public static final Jama.Matrix dsigma(Jama.Matrix A)

Derivative of the sigmoid function applied to Jama Matrix

deep_copy

public static int[][] deep_copy(int[][] M)

Deep Copy - Make a deep copy of M[][].