Sigmoid

java.lang.Object
- libai.common.functions.Sigmoid

All Implemented Interfaces:

java.io.Serializable, Function
```
public class Sigmoid
extends java.lang.Object
implements Function
```
Sigmoid function: f(x) = 1/(1+e^-x) The first derivate of the sigmoid function S(x) S'(x) = S(x)*(1-S(x))

See Also:

Serialized Form

Constructor Summary

Constructors
Constructor Description

Sigmoid()

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`double`	`eval(double x)`	Function to evaluate.
`Function`	`getDerivate()`	Evaluate the first derivate of this function f'(x)

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - Sigmoid
```
public Sigmoid()
```
- Method Detail
  - eval
```
public double eval(double x)
```
    Description copied from interface: Function
    
    Function to evaluate.
    
    Specified by:
    
    eval in interface Function
    
    Parameters:
    
    x - the input value
    
    Returns:
    
    f(x)
  - getDerivate
```
public Function getDerivate()
```
    Description copied from interface: Function
    
    Evaluate the first derivate of this function f'(x)
    
    Specified by:
    
    getDerivate in interface Function
    
    Returns:
    
    a new Function object with the derivate function.