Package edu.cmu.tetrad.algcomparison.simulation

Class SemSimulation

java.lang.Object

edu.cmu.tetrad.algcomparison.simulation.SemSimulation

All Implemented Interfaces:

Simulation, HasParameters, TetradSerializable, Serializable

public class SemSimulation
extends Object
implements Simulation

This class represents a Simulation using Structural Equation Modeling (SEM).

See Also:

• Serialized Form

Constructor Summary

Constructors

Constructor	Description
SemSimulation(RandomGraph graph)	Constructs a SemSimulation object with the given RandomGraph object.
SemSimulation(SemIm im)	Constructs a GeneralSemSimulation object with the given SemIm object.
SemSimulation(SemPm pm)	Initializes a SemSimulation with the given SemPm object.

Method Summary

Modifier and Type	Method	Description
void	createData(Parameters parameters, boolean newModel)	Creates data sets for simulation based on the given parameters and model reuse preference.
DataModel	getDataModel(int index)	Returns the data model at the specified index.
DataType	getDataType()	Returns the data type of the data set.
String	getDescription()	Returns the description of the simulation.
List<SemIm>	getIms()	Retrieves the list of SemIm objects used for simulation.
int	getNumDataModels()	Returns the number of data models.
List<String>	getParameters()	Retrieves the parameters required for the simulation.
Class<? extends RandomGraph>	getRandomGraphClass()	Retrieves the class of a random graph for the simulation.
String	getShortName()	Returns the short name of the simulation.
Class<? extends Simulation>	getSimulationClass()	Returns the class of the simulation.
Graph	getTrueGraph(int index)	Returns the true graph at the specified index.

Methods inherited from class java.lang.Object

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

Constructor Details

SemSimulation

public SemSimulation(RandomGraph graph)

Constructs a SemSimulation object with the given RandomGraph object.

Parameters:

graph - the RandomGraph object used for simulation.

Throws:

NullPointerException - if graph is null.

SemSimulation

public SemSimulation(SemPm pm)

Initializes a SemSimulation with the given SemPm object.

Parameters:

pm - the SemPm object used for simulation.

Throws:

NullPointerException - if pm is null.

SemSimulation

public SemSimulation(SemIm im)

Constructs a GeneralSemSimulation object with the given SemIm object.

Parameters:

im - the SemIm object used for simulation

Method Details

createData

public void createData(Parameters parameters,
 boolean newModel)

Creates data sets for simulation based on the given parameters and model reuse preference.

Specified by:

createData in interface Simulation

Parameters:

parameters - The parameters to use in the simulation.

newModel - If true, a new model is created. If false, the model is reused.

getIms

public List<SemIm> getIms()

Retrieves the list of SemIm objects used for simulation.

Returns:

The list of SemIm objects.

getTrueGraph

public Graph getTrueGraph(int index)

Returns the true graph at the specified index.

Specified by:

getTrueGraph in interface Simulation

Parameters:

index - The index of the desired true graph.

Returns:

The true graph at the specified index.

getNumDataModels

public int getNumDataModels()

Returns the number of data models.

Specified by:

getNumDataModels in interface Simulation

Returns:

The number of data sets to simulate.

getDataModel

public DataModel getDataModel(int index)

Returns the data model at the specified index.

Specified by:

getDataModel in interface Simulation

Parameters:

index - The index of the desired simulated data set.

Returns:

The data model at the specified index.

getDataType

public DataType getDataType()

Returns the data type of the data set.

Specified by:

getDataType in interface Simulation

Returns:

The type of the data set--continuous if all continuous variables, discrete if all discrete variables; otherwise, mixed.

getDescription

public String getDescription()

Returns the description of the simulation.

Specified by:

getDescription in interface Simulation

Returns:

a short, one-line description of the simulation.

getShortName

public String getShortName()

Returns the short name of the simulation.

Specified by:

getShortName in interface Simulation

Returns:

The short name of the simulation.

getParameters

public List<String> getParameters()

Retrieves the parameters required for the simulation.

Specified by:

getParameters in interface HasParameters

Specified by:

getParameters in interface Simulation

Returns:

A list of String names representing the parameters.

getRandomGraphClass

public Class<? extends RandomGraph> getRandomGraphClass()

Description copied from interface: Simulation

Retrieves the class of a random graph for the simulation.

Specified by:

getRandomGraphClass in interface Simulation

Returns:

The class of a random graph for the simulation.

getSimulationClass

public Class<? extends Simulation> getSimulationClass()

Description copied from interface: Simulation

Returns the class of the simulation. This method is used to retrieve the class of a simulation based on the selected simulations in the model.

Specified by:

getSimulationClass in interface Simulation

Returns:

The class of the simulation.