Package edu.cmu.tetrad.search.score

Class MvpLikelihood

java.lang.Object

edu.cmu.tetrad.search.score.MvpLikelihood

public class MvpLikelihood
extends Object

Calculates Mixed Variables Polynomial likelihood. The reference is here:

Andrews, B., Ramsey, J., & Cooper, G. F. (2018). Scoring Bayesian networks of mixed variables. International journal of data science and analytics, 6, 3-18.

Version:

$Id: $Id

Author:

Bryan Andrews

Constructor Summary

Constructors

Constructor	Description
MvpLikelihood(DataSet dataSet, double structurePrior, int fDegree, boolean discretize)	Constructs the score using a data set.

Method Summary

Modifier and Type	Method	Description
double	getDoF(int child_index, int[] parents)	Returns the score of the node at index i, given its parents.
double	getEBICprior()	getEBICprior.
double	getLik(int child_index, int[] parents)	Returns the score of the node at index i, given its parents.
double	getStructurePrior(int k)	Returns the structure prior.

Methods inherited from class java.lang.Object

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

Constructor Details

MvpLikelihood

public MvpLikelihood(DataSet dataSet,
 double structurePrior,
 int fDegree,
 boolean discretize)

Constructs the score using a data set.

Parameters:

dataSet - A dataset with a mixture of continuous and discrete variables. It may be all continuous or

structurePrior - The structure prior.

fDegree - F-degree

discretize - When a discrete variable is a child of a continuous variable, one (expensive) way to solve the problem is to do a numerical integration. A less expensive (and often more accurate) way to solve the problem is to discretize the child with a certain number of discrete categories. if this parameter is set to True, a separate copy of all variables is maintained that is discretized in this way, and these are substituted for the discrete children when this sort of problem needs to be solved. This information needs to be known in the constructor since one needs to know right away whether ot create this separate discretized version of the continuous columns.

Method Details

getLik

public double getLik(int child_index,
 int[] parents)

Returns the score of the node at index i, given its parents.

Parameters:

child_index - The index of the child.

parents - The indices of the parents.

Returns:

The score.

getDoF

public double getDoF(int child_index,
 int[] parents)

Returns the score of the node at index i, given its parents.

Parameters:

child_index - The index of the child.

parents - The indices of the parents.

Returns:

The score.

getStructurePrior

public double getStructurePrior(int k)

Returns the structure prior.

Parameters:

k - The number of edges.

Returns:

The structure prior.

getEBICprior

public double getEBICprior()

getEBICprior.

Returns:

a double