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// For information as to what this class does, see the Javadoc, below. //
// Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, //
// 2007, 2008, 2009, 2010, 2014, 2015, 2022 by Peter Spirtes, Richard //
// Scheines, Joseph Ramsey, and Clark Glymour. //
// //
// This program is free software; you can redistribute it and/or modify //
// it under the terms of the GNU General Public License as published by //
// the Free Software Foundation; either version 2 of the License, or //
// (at your option) any later version. //
// //
// This program is distributed in the hope that it will be useful, //
// but WITHOUT ANY WARRANTY; without even the implied warranty of //
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the //
// GNU General Public License for more details. //
// //
// You should have received a copy of the GNU General Public License //
// along with this program; if not, write to the Free Software //
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA //
///////////////////////////////////////////////////////////////////////////////
package edu.cmu.tetrad.search.test;
import edu.cmu.tetrad.data.DataSet;
import edu.cmu.tetrad.graph.IndependenceFact;
import edu.cmu.tetrad.graph.Node;
import edu.cmu.tetrad.search.IndependenceTest;
import edu.cmu.tetrad.search.utils.LogUtilsSearch;
import edu.cmu.tetrad.search.utils.ResolveSepsets;
import edu.cmu.tetrad.util.TetradLogger;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
/**
* Pools together a set of independence tests using a specified method.
*
* @author Robert Tillman
*/
public final class IndTestMulti implements IndependenceTest {
/**
* The variables of the covariance matrix, in order. (Unmodifiable list.)
*/
private final List variables;
/**
* The independence test associated with each data set.
*/
private final List independenceTests;
/**
* Pooling method
*/
private final ResolveSepsets.Method method;
private boolean verbose;
// private DataSet concatenatedData;
public IndTestMulti(List independenceTests, ResolveSepsets.Method method) {
Set nodeNames = new HashSet<>();
for (IndependenceTest independenceTest : independenceTests) {
nodeNames.addAll(independenceTest.getVariableNames());
}
if (independenceTests.iterator().next().getVariables().size() != nodeNames.size()) {
throw new IllegalArgumentException("Data sets must have same variables.");
}
this.variables = independenceTests.iterator().next().getVariables();
this.independenceTests = independenceTests;
this.method = method;
}
public IndependenceTest indTestSubset(List vars) {
throw new UnsupportedOperationException();
}
/**
* Determines whether variable x is independent of variable y given a list of conditioning variables z.
*
* @param x the one variable being compared.
* @param y the second variable being compared.
* @param z the list of conditioning variables.
* @return True iff x _||_ y | z.
* @throws RuntimeException if a matrix singularity is encountered.
*/
public IndependenceResult checkIndependence(Node x, Node y, Set z) {
boolean independent = ResolveSepsets.isIndependentPooled(this.method, this.independenceTests, x, y, z);
if (independent) {
TetradLogger.getInstance().log("independencies", "In aggregate independent: " + LogUtilsSearch.independenceFact(x, y, z));
} else {
TetradLogger.getInstance().log("dependencies", "In aggregate dependent: " + LogUtilsSearch.independenceFact(x, y, z));
}
return new IndependenceResult(new IndependenceFact(x, y, z), independent, Double.NaN, Double.NaN);
}
/**
* Gets the getModel significance level.
*/
public double getAlpha() {
throw new UnsupportedOperationException();
}
public void setAlpha(double alpha) {
throw new UnsupportedOperationException();
}
/**
* @return the list of variables over which this independence checker is capable of determinine independence
* relations-- that is, all the variables in the given graph or the given data set.
*/
public List getVariables() {
return this.variables;
}
/**
* @throws UnsupportedOperationException Method not implemented.
*/
public boolean determines(List z, Node x) throws UnsupportedOperationException {
throw new UnsupportedOperationException();
}
/**
* @throws javax.help.UnsupportedOperationException Method not implemented.
*/
public DataSet getData() {
throw new UnsupportedOperationException();
}
/**
* @return a string representation of this test.
*/
public String toString() {
return "Pooled Independence Test: alpha = " + this.independenceTests.iterator().next().getAlpha();
}
/**
* Returns true if the test prints verbose output.
*
* @return True if the case.
*/
@Override
public boolean isVerbose() {
return this.verbose;
}
/**
* Sets whether this test will print verbose output.
*
* @param verbose True, if so.
*/
@Override
public void setVerbose(boolean verbose) {
this.verbose = verbose;
}
}