Package edu.pitt.csb.mgm

Class IndTestMultinomialLogisticRegressionWald

java.lang.Object

edu.pitt.csb.mgm.IndTestMultinomialLogisticRegressionWald

All Implemented Interfaces:

IndependenceTest

public class IndTestMultinomialLogisticRegressionWald
extends Object
implements IndependenceTest

Performs a test of conditional independence X _||_ Y | Z1...Zn where all searchVariables are either continuous or discrete. This test is valid for both ordinal and non-ordinal discrete searchVariables.

This logisticRegression makes multiple assumptions: 1. IIA 2. Large sample size (multiple regressions needed on subsets of sample)

Version:

$Id: $Id

Author:

josephramsey, Augustus Mayo.

Constructor Summary

Constructors

Constructor	Description
IndTestMultinomialLogisticRegressionWald(DataSet data, double alpha, boolean preferLinear)	Constructor for IndTestMultinomialLogisticRegressionWald.

Method Summary

Modifier and Type	Method	Description
IndependenceResult	checkIndependence(Node x, Node y, Set<Node> z)	checkIndependence.
boolean	determines(List<Node> z, Node y)
double	getAlpha()	Getter for the field alpha.
DataSet	getData()	getData.
double	getPValue()	getPValue.
List<Node>	getVariables()	getVariables.
IndependenceTest	indTestSubset(List<Node> vars)	Returns an Independence test for a sublist of the variables.
boolean	isVerbose()	Returns true if the test prints verbose output.
void	setAlpha(double alpha)	Sets the significance level.
void	setVerbose(boolean verbose)	Sets whether this test will print verbose output.
String	toString()	toString.

Methods inherited from class java.lang.Object

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

Methods inherited from interface edu.cmu.tetrad.search.IndependenceTest

checkIndependence, determines, getCov, getDataSets, getSampleSize, getVariable, getVariableNames

Constructor Details

IndTestMultinomialLogisticRegressionWald

public IndTestMultinomialLogisticRegressionWald(DataSet data,
 double alpha,
 boolean preferLinear)

Constructor for IndTestMultinomialLogisticRegressionWald.

Parameters:

data - a DataSet object

alpha - a double

preferLinear - a boolean

Method Details

indTestSubset

public IndependenceTest indTestSubset(List<Node> vars)

Returns an Independence test for a sublist of the variables.

Specified by:

indTestSubset in interface IndependenceTest

Parameters:

vars - The sublist of variables.

Returns:

a IndependenceTest object

checkIndependence

public IndependenceResult checkIndependence(Node x,
 Node y,
 Set<Node> z)

checkIndependence.

Specified by:

checkIndependence in interface IndependenceTest

Parameters:

x - a Node object

y - a Node object

z - a Set object

Returns:

a IndependenceResult object

See Also:

• IndependenceResult

getPValue

public double getPValue()

getPValue.

Returns:

the probability associated with the most recently executed independence test, of Double.NaN if p value is not meaningful for tis test.

getVariables

public List<Node> getVariables()

getVariables.

Specified by:

getVariables in interface IndependenceTest

Returns:

the list of searchVariables over which this independence checker is capable of determinining independence relations.

determines

public boolean determines(List<Node> z,
 Node y)

getAlpha

public double getAlpha()

Getter for the field alpha.

Specified by:

getAlpha in interface IndependenceTest

Returns:

the significance level of the independence test.

Throws:

UnsupportedOperationException - if there is no significance level.

setAlpha

public void setAlpha(double alpha)

Sets the significance level.

Sets the significance level.

Specified by:

setAlpha in interface IndependenceTest

Parameters:

alpha - This level.

getData

public DataSet getData()

getData.

Specified by:

getData in interface IndependenceTest

Returns:

a DataSet object

See Also:

• DataSet
• ICovarianceMatrix
• DataModel

toString

public String toString()

toString.

Specified by:

toString in interface IndependenceTest

Overrides:

toString in class Object

Returns:

a string representation of this test.

isVerbose

public boolean isVerbose()

Returns true if the test prints verbose output.

Specified by:

isVerbose in interface IndependenceTest

Returns:

True if the case.

setVerbose

public void setVerbose(boolean verbose)

Sets whether this test will print verbose output.

Specified by:

setVerbose in interface IndependenceTest

Parameters:

verbose - True, if so.