SigmoidKernel (BioJava-1.7.1 API)

java.lang.Object
- org.biojava.stats.svm.SigmoidKernel

All Implemented Interfaces:

SVMKernel
```
public class SigmoidKernel
extends java.lang.Object
implements SVMKernel
```
This kernel implements a three layer neural net. This is calculated as: tanh(a*k(x,y)+c)

Author:

Matthew Pocock

Constructor Summary

Constructors
Constructor Description

SigmoidKernel()

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`double`	`evaluate(java.lang.Object a, java.lang.Object b)`	Return the dot product of two vectors in an arbitrary feature space.
`double`	`getConstant()`
`double`	`getMultiplier()`
`SVMKernel`	`getWrappedKernel()`
`void`	`setConstant(double c)`
`void`	`setMultiplier(double m)`
`void`	`setWrappedKernel(SVMKernel kernel)`
`double`	`tanh(double a)`
`java.lang.String`	`toString()`

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

Constructor Detail
- SigmoidKernel
```
public SigmoidKernel()
```

Method Detail

evaluate
```
public double evaluate(java.lang.Object a,
                       java.lang.Object b)
```
Description copied from interface: SVMKernel

Return the dot product of two vectors in an arbitrary feature space. In this implementation, the `vectors' can actually be arbitrary objects.

Specified by:

evaluate in interface SVMKernel

getConstant
```
public double getConstant()
```

setConstant
```
public void setConstant(double c)
```

getMultiplier
```
public double getMultiplier()
```

setMultiplier

public void setMultiplier(double m)

getWrappedKernel
```
public SVMKernel getWrappedKernel()
```

setWrappedKernel

public void setWrappedKernel(SVMKernel kernel)

toString
```
public java.lang.String toString()
```
Overrides:

toString in class java.lang.Object

tanh
```
public double tanh(double a)
```