SciLib.SP.Transform
Class Trans

java.lang.Object
  SciLib.SP.Transform.Trans

public final class Trans
extends java.lang.Object

This class defines some simple transformation methods.

Field Summary

static int	CUBEROOT
static int	FFT
static int	IDENTITY
static int	LOG
static int	NORMALIZE
static int	NORMALIZE1
static int	SIGMOID
static int	SIGMOID2

Constructor Summary

Trans()

Method Summary

static void	cuberoot(vector x) cuberoot transform of a vector
static void	log(vector x) Take logarithm of a vector that has positive elements
static void	normalize(vector x) normalize a vector x so that it has norm 1
static void	normalize1(vector x) normalize a vector by so that it has all elements between 0 and 1
static void	sigmoid(vector x) Sigmoid transform of a vector
static void	sigmoid2(vector x) Sigmoid2 transform of a vector
static void	transform(matrix x, int type) make a transformation
static void	transform(vector v, int type) make a transformation

Methods inherited from class java.lang.Object

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

Field Detail

IDENTITY

public static final int IDENTITY

See Also:

Constant Field Values

NORMALIZE

public static final int NORMALIZE

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Constant Field Values

NORMALIZE1

public static final int NORMALIZE1

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Constant Field Values

FFT

public static final int FFT

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Constant Field Values

SIGMOID

public static final int SIGMOID

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Constant Field Values

SIGMOID2

public static final int SIGMOID2

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Constant Field Values

CUBEROOT

public static final int CUBEROOT

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Constant Field Values

LOG

public static final int LOG

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Constant Field Values

Constructor Detail

Trans

public Trans()

Method Detail

normalize

public static void normalize(vector x)

normalize a vector x so that it has norm 1

Parameters:

x - A vector

normalize1

public static void normalize1(vector x)

normalize a vector by so that it has all elements between 0 and 1

Parameters:

x - A vector

log

public static void log(vector x)

Take logarithm of a vector that has positive elements

Parameters:

x - A vector

sigmoid

public static void sigmoid(vector x)

Sigmoid transform of a vector

Parameters:

x - A vector

sigmoid2

public static void sigmoid2(vector x)

Sigmoid2 transform of a vector

Parameters:

x - A vector

cuberoot

public static void cuberoot(vector x)

cuberoot transform of a vector

Parameters:

x - A vector

transform

public static void transform(vector v,
                             int type)

make a transformation

Parameters:

v - the original vector

type - Transformation type

transform

public static void transform(matrix x,
                             int type)

make a transformation

Parameters:

x - the original matrix

type - Transformation type