Class GmmModel

java.lang.Object

com.knezevic.edaf.v3.models.continuous.GmmModel

All Implemented Interfaces:

Model<RealVector>

public final class GmmModel
extends Object
implements Model<RealVector>

Diagonal-covariance Gaussian Mixture Model (GMM) with EM fitting.

The model estimates:

   p(x) = Σ_k π_k N(x | μ_k, diag(σ_k²))
 

by alternating expectation/maximization steps for a fixed number of iterations. Sampling first draws a component index from π and then samples each dimension from its corresponding diagonal Gaussian.

Constructor Summary

Constructors

Constructor	Description
GmmModel(int components, int emIterations, double minVariance)

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

GmmModel

public GmmModel(int components,
 int emIterations,
 double minVariance)

Parameters:

components - number of mixture components

emIterations - number of EM iterations per fit

minVariance - floor for per-dimension component variance

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>