Class Sigmoid

java.lang.Object

deepnetts.net.layers.activation.Sigmoid

All Implemented Interfaces:

ActivationFunction, Serializable, Consumer<Tensor>

public final class Sigmoid
extends Object
implements ActivationFunction, Serializable

Sigmoid activation function

Author:

Zoran Sevarac

See Also:

• Sigmoid_function on Wikipedia
• Serialized Form

Constructor Summary

Constructors

Constructor	Description
Sigmoid()

Method Summary

Modifier and Type	Method	Description
void	apply(Tensor3D tensor, int channel)
void	apply(Tensor4D tensor, int batchIdx)
void	apply(Tensor tensor, int from, int to)
float	getPrime(float y)	Returns the first derivative of activation function for specified output y
float	getValue(float x)	Returns the value of activation function for specified input x

Methods inherited from class Object

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

Methods inherited from interface ActivationFunction

accept

Methods inherited from interface Consumer

andThen

Constructor Details

Sigmoid

public Sigmoid()

Method Details

getValue

public float getValue(float x)

Description copied from interface: ActivationFunction

Returns the value of activation function for specified input x

Specified by:

getValue in interface ActivationFunction

Parameters:

x - input for activation

Returns:

value of activation function

getPrime

public float getPrime(float y)

Description copied from interface: ActivationFunction

Returns the first derivative of activation function for specified output y

Specified by:

getPrime in interface ActivationFunction

Parameters:

y - output of activation function

Returns:

first derivative of activation function

apply

public void apply(Tensor3D tensor,
 int channel)

Specified by:

apply in interface ActivationFunction

apply

public void apply(Tensor4D tensor,
 int batchIdx)

Specified by:

apply in interface ActivationFunction

apply

public void apply(Tensor tensor,
 int from,
 int to)

Specified by:

apply in interface ActivationFunction