org.apache.mahout.classifier.mlp

Class NeuralNetworkFunctions

java.lang.Object

org.apache.mahout.classifier.mlp.NeuralNetworkFunctions

Deprecated.

as of as of 0.10.0.

@Deprecated
public class NeuralNetworkFunctions
extends Object

The functions that will be used by NeuralNetwork.

Field Summary

Fields

Modifier and Type	Field and Description
static DoubleDoubleFunction	crossEntropy Deprecated. The cross entropy function (f(t, o) = -t * log(o) - (1 - t) * log(1 - o)).
static DoubleDoubleFunction	derivativeCrossEntropy Deprecated. The derivation of cross entropy function (f(t, o) = -t * log(o) - (1 - t) * log(1 - o)).
static DoubleFunction	derivativeIdentityFunction Deprecated. The derivation of identity function (f(x) = x).
static DoubleDoubleFunction	derivativeMinusSquared Deprecated. The derivation of minus squared function (f(t, o) = (o - t)^2).

Constructor Summary

Constructors

Constructor and Description
NeuralNetworkFunctions() Deprecated.

Method Summary

Methods

Modifier and Type	Method and Description
static DoubleDoubleFunction	getDerivativeDoubleDoubleFunction(String function) Deprecated. Get the corresponding derivation of double double function by the name.
static DoubleFunction	getDerivativeDoubleFunction(String function) Deprecated. Get the derivation double function by the name.
static DoubleDoubleFunction	getDoubleDoubleFunction(String function) Deprecated. Get the corresponding double-double function by the name.
static DoubleFunction	getDoubleFunction(String function) Deprecated. Get the corresponding function by its name.

Methods inherited from class java.lang.Object

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

Field Detail

derivativeIdentityFunction

public static DoubleFunction derivativeIdentityFunction

Deprecated.

The derivation of identity function (f(x) = x).

derivativeMinusSquared

public static DoubleDoubleFunction derivativeMinusSquared

Deprecated.

The derivation of minus squared function (f(t, o) = (o - t)^2).

crossEntropy

public static DoubleDoubleFunction crossEntropy

Deprecated.

The cross entropy function (f(t, o) = -t * log(o) - (1 - t) * log(1 - o)).

derivativeCrossEntropy

public static DoubleDoubleFunction derivativeCrossEntropy

Deprecated.

The derivation of cross entropy function (f(t, o) = -t * log(o) - (1 - t) * log(1 - o)).

Constructor Detail

NeuralNetworkFunctions

public NeuralNetworkFunctions()

Deprecated.

Method Detail

getDoubleFunction

public static DoubleFunction getDoubleFunction(String function)

Deprecated.

Get the corresponding function by its name. Currently supports: "Identity", "Sigmoid".

Parameters:

function - The name of the function.

Returns:

The corresponding double function.

getDerivativeDoubleFunction

public static DoubleFunction getDerivativeDoubleFunction(String function)

Deprecated.

Get the derivation double function by the name. Currently supports: "Identity", "Sigmoid".

Parameters:

function - The name of the function.

Returns:

The double function.

getDoubleDoubleFunction

public static DoubleDoubleFunction getDoubleDoubleFunction(String function)

Deprecated.

Get the corresponding double-double function by the name. Currently supports: "Minus_Squared", "Cross_Entropy".

Parameters:

function - The name of the function.

Returns:

The double-double function.

getDerivativeDoubleDoubleFunction

public static DoubleDoubleFunction getDerivativeDoubleDoubleFunction(String function)

Deprecated.

Get the corresponding derivation of double double function by the name. Currently supports: "Minus_Squared", "Cross_Entropy".

Parameters:

function - The name of the function.

Returns:

The double-double-function.