Package edu.cmu.tetrad.sem

Class SemOptimizerEm

java.lang.Object

edu.cmu.tetrad.sem.SemOptimizerEm

All Implemented Interfaces:

SemOptimizer, TetradSerializable, Serializable

public class SemOptimizerEm
extends Object
implements SemOptimizer

Optimizes a DAG SEM with hidden variables using expectation-maximization. IT SHOULD NOT BE USED WITH SEMs THAT ARE NOT DAGS. For DAGs without hidden variables, SemOptimizerRegression should be more efficient.

Author:

Ricardo Silva, josephramsey Cleanup, modernization.

See Also:

• Serialized Form

Constructor Summary

Constructors

Constructor	Description
SemOptimizerEm()

Method Summary

Modifier and Type	Method	Description
int	getNumRestarts()
void	optimize(SemIm semIm)	Optimizes the fitting function of a Sem by adjusting its parameter values.
static SemOptimizerEm	serializableInstance()	Generates a simple exemplar of this class to test serialization.
void	setNumRestarts(int numRestarts)
String	toString()

Methods inherited from class java.lang.Object

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

Constructor Details

SemOptimizerEm

public SemOptimizerEm()

Method Details

serializableInstance

public static SemOptimizerEm serializableInstance()

Generates a simple exemplar of this class to test serialization.

optimize

public void optimize(SemIm semIm)

Description copied from interface: SemOptimizer

Optimizes the fitting function of a Sem by adjusting its parameter values.

Specified by:

optimize in interface SemOptimizer

Parameters:

semIm - The unoptimized Sem (will be optimized).

getNumRestarts

public int getNumRestarts()

Specified by:

getNumRestarts in interface SemOptimizer

setNumRestarts

public void setNumRestarts(int numRestarts)

Specified by:

setNumRestarts in interface SemOptimizer

toString

public String toString()

Overrides:

toString in class Object