org.knime.base.node.mine.bfn.radial
Class RadialBasisFunctionFactory

java.lang.Object
  org.knime.base.node.mine.bfn.BasisFunctionFactory
      org.knime.base.node.mine.bfn.radial.RadialBasisFunctionFactory

public class RadialBasisFunctionFactory
extends BasisFunctionFactory

Basic interface for all basis function algorithms. Provides the function getNewBasisFunction(.) to initialise a new prototype. This interface is needed in order to create new prototypes in the general BasisFunctionLearner. Hence a BasisFunctionLearner would be initialised with an object of type BasisFunctionFactory. It is used as inter-class to init BasisFunction(s). One implementation of the BasisFunctionFactory; here represents the RadialBasisFunctionFactory object.

Author:

Thomas Gabriel, University of Konstanz

See Also:

RadialBasisFunctionLearnerRow, commit(RowKey, DataCell, DataRow)

Field Summary

(package private) static String	THETA_MINUS Key of theta minus.
(package private) static String	THETA_PLUS Key of theta plus.

Fields inherited from class org.knime.base.node.mine.bfn.BasisFunctionFactory

CLASS_COLUMN

Constructor Summary

protected

RadialBasisFunctionFactory(double thetaMinus, double thetaPlus, int distance, DataTableSpec spec, String[] targetColumns) Creates a new factory for a radial basis function learner.

Method Summary

BasisFunctionLearnerRow	commit(RowKey key, DataCell classInfo, DataRow row) Creates and returns a new RadialBasisFunctionLearnerRow initialized with a center vector and a class label.
double	getThetaMinus() Returns the upper bound for conflicting instances.
double	getThetaPlus() Returns the lower bound for non-conflicting instances.
void	save(ModelContent pp) Saves to model content.

Methods inherited from class org.knime.base.node.mine.bfn.BasisFunctionFactory

createModelSpec, findDataColumns, getDistance, getMaximums, getMinimums, getModelSpec

Methods inherited from class java.lang.Object

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

Field Detail

THETA_MINUS

static final String THETA_MINUS

Key of theta minus.

See Also:

Constant Field Values

THETA_PLUS

static final String THETA_PLUS

Key of theta plus.

See Also:

Constant Field Values

Constructor Detail

RadialBasisFunctionFactory

protected RadialBasisFunctionFactory(double thetaMinus,
                                     double thetaPlus,
                                     int distance,
                                     DataTableSpec spec,
                                     String[] targetColumns)

Creates a new factory for a radial basis function learner.

Parameters:

thetaMinus - the upper bound activation for conflicting instances

thetaPlus - the lower bound activation for non-conflicting instances

distance - the choice of distance function

spec - the input data to learn from

targetColumns - the class info columns in the data

Method Detail

commit

public BasisFunctionLearnerRow commit(RowKey key,
                                      DataCell classInfo,
                                      DataRow row)

Creates and returns a new RadialBasisFunctionLearnerRow initialized with a center vector and a class label.

Specified by:

commit in class BasisFunctionFactory

Parameters:

key - this row's key

row - the initial center vector

classInfo - the class info

Returns:

A new basisfunction.

getThetaMinus

public final double getThetaMinus()

Returns the upper bound for conflicting instances.

Returns:

the upper bound for activation

getThetaPlus

public final double getThetaPlus()

Returns the lower bound for non-conflicting instances.

Returns:

the lower bound for activation

save

public void save(ModelContent pp)

Saves to model content.

Overrides:

save in class BasisFunctionFactory

Parameters:

pp - the model content this is saved to.