org.knime.base.node.mine.svm.kernel
Class RBFKernel

java.lang.Object
  org.knime.base.node.mine.svm.kernel.RBFKernel

All Implemented Interfaces:

Kernel

public class RBFKernel
extends Object
implements Kernel

RBF Kernel.

Author:

Stefan Ciobaca, University of Konstanz, Nicolas Cebron, University of Konstanz

Constructor Summary

RBFKernel()

Method Summary

boolean	areValid(double[] params) are these parameters ok to be used?
double	evaluate(double[] a, double[] b) returns the value of the kernel given vectors a and b.
double	evaluate(DoubleVector a, DoubleVector b) evaluate the kernel.
double	getDefaultParameter(int index) return the default parameter at the given index.
int	getNumberParameters() just 1 parameter (sigma).
double	getParameter(int index) return the given parameter.
String	getParameterName(int index) get the name of the parameter.
KernelFactory.KernelType	getType()
void	setParameter(int index, double value) set the given parameter.

Methods inherited from class java.lang.Object

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

Constructor Detail

RBFKernel

public RBFKernel()

Method Detail

evaluate

public double evaluate(DoubleVector a,
                       DoubleVector b)

evaluate the kernel.

Specified by:

evaluate in interface Kernel

Parameters:

a - first vector

b - second vector

Returns:

the result

See Also:

DoubleVector

evaluate

public double evaluate(double[] a,
                       double[] b)

returns the value of the kernel given vectors a and b.

Specified by:

evaluate in interface Kernel

Parameters:

a - the first vector

b - the second vector

Returns:

the result of the kernel in a and b

getNumberParameters

public int getNumberParameters()

just 1 parameter (sigma).

Specified by:

getNumberParameters in interface Kernel

Returns:

1

See Also:

Kernel.getNumberParameters()

getParameterName

public String getParameterName(int index)

get the name of the parameter.

Specified by:

getParameterName in interface Kernel

Parameters:

index - must be 0

Returns:

the name of the parameter

See Also:

Kernel.getParameterName(int)

areValid

public boolean areValid(double[] params)

are these parameters ok to be used?

Specified by:

areValid in interface Kernel

Parameters:

params - the bias and power

Returns:

validity

See Also:

Kernel.areValid(double[])

getDefaultParameter

public double getDefaultParameter(int index)

return the default parameter at the given index. index must be between 0 and getNumberParameters() - 1.

Specified by:

getDefaultParameter in interface Kernel

Parameters:

index - the parameter index.

Returns:

the parameter's default value

setParameter

public void setParameter(int index,
                         double value)

set the given parameter.

Specified by:

setParameter in interface Kernel

Parameters:

index - must be 0

value - which value

See Also:

Kernel.setParameter(int, double)

getParameter

public double getParameter(int index)

return the given parameter.

Specified by:

getParameter in interface Kernel

Parameters:

index - must be 0

Returns:

value of kernel parameter

See Also:

Kernel.getParameter(int)

getType

public KernelFactory.KernelType getType()

Specified by:

getType in interface Kernel

Returns:

the KernelFactory.KernelType of the Kernel