Class KdeModel

java.lang.Object

com.knezevic.edaf.v3.models.continuous.KdeModel

All Implemented Interfaces:

Model<RealVector>

public final class KdeModel
extends Object
implements Model<RealVector>

Kernel Density Estimation (KDE) model with Gaussian kernels.

The elite set is stored as kernel centers. Per-dimension bandwidth is estimated from sample standard deviation with Silverman-like scaling:

   h_d = scale * n^(-1/(D+4)) * std_d
 

and clipped by minBandwidth. Sampling draws one elite center at random and perturbs it with Gaussian noise scaled by h_d.

Constructor Summary

Constructors

Constructor	Description
KdeModel(double bandwidthScale, double minBandwidth)

Method Summary

Modifier and Type	Method	Description
ModelDiagnostics	diagnostics()	Exposes diagnostics (entropy, covariance condition number, etc.).
void	fit(List<Individual<RealVector>> selected, Representation<RealVector> representation, RngStream rng)	Fits model parameters from selected individuals.
String	name()	Model identifier used in configuration and listing commands.
List<RealVector>	sample(int count, Representation<RealVector> representation, Problem<RealVector> problem, ConstraintHandling<RealVector> constraintHandling, RngStream rng)	Samples new genotypes from model.

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.knezevic.edaf.v3.core.api.Model

update

Constructor Details

KdeModel

public KdeModel(double bandwidthScale,
 double minBandwidth)

Parameters:

bandwidthScale - multiplicative factor applied to Silverman bandwidth

minBandwidth - minimal per-dimension kernel width

Method Details

name

public String name()

Description copied from interface: Model

Model identifier used in configuration and listing commands.

Specified by:

name in interface Model<RealVector>

fit

public void fit(List<Individual<RealVector>> selected,
 Representation<RealVector> representation,
 RngStream rng)

Description copied from interface: Model

Fits model parameters from selected individuals.

Specified by:

fit in interface Model<RealVector>

sample

public List<RealVector> sample(int count,
 Representation<RealVector> representation,
 Problem<RealVector> problem,
 ConstraintHandling<RealVector> constraintHandling,
 RngStream rng)

Description copied from interface: Model

Samples new genotypes from model.

Specified by:

sample in interface Model<RealVector>

diagnostics

public ModelDiagnostics diagnostics()

Description copied from interface: Model

Exposes diagnostics (entropy, covariance condition number, etc.).

Specified by:

diagnostics in interface Model<RealVector>