Package edu.cmu.tetrad.search

Class LingamPattern

java.lang.Object

edu.cmu.tetrad.search.LingamPattern

public class LingamPattern
extends Object

Implements the Lingam CPDAG algorithm as specified in Hoyer et al., "Causal discovery of linear acyclic models with arbitrary distributions," UAI 2008. The test for normality used for residuals is Anderson-Darling, following 'ad.test' in the nortest package of R. The default alpha level is 0.05--that is, p values from AD below 0.05 are taken to indicate nongaussianity.

It is assumed that the CPDAG is the result of a CPDAG search such as PC or GES. In any case, it is important that the residuals be independent for ICA to work.

Author:

Joseph Ramsey

Constructor Summary

Constructors

Constructor	Description
LingamPattern(Graph cpdag, DataSet dataSet)

Method Summary

Modifier and Type	Method	Description
double	getAlpha()
double[]	getPValues()
Graph	search()
void	setAlpha(double alpha)

Methods inherited from class java.lang.Object

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

Constructor Details

LingamPattern

public LingamPattern(Graph cpdag,
 DataSet dataSet)
              throws IllegalArgumentException

Throws:

IllegalArgumentException

Method Details

search

public Graph search()

getPValues

public double[] getPValues()

getAlpha

public double getAlpha()

setAlpha

public void setAlpha(double alpha)