/*
* RandomWalkIntegerNodeHeightWeightedOperator.java
*
* Copyright (c) 2002-2015 Alexei Drummond, Andrew Rambaut and Marc Suchard
*
* This file is part of BEAST.
* See the NOTICE file distributed with this work for additional
* information regarding copyright ownership and licensing.
*
* BEAST is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* BEAST 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with BEAST; if not, write to the
* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301 USA
*/
package dr.evomodel.operators;
import dr.inference.model.Parameter;
import dr.evomodelxml.operators.RandomWalkIntegerNodeHeightWeightedOperatorParser;
import dr.inference.operators.RandomWalkIntegerOperator;
import dr.math.MathUtils;
/**
* @author Chieh-Hsi Wu
*
* The probability an internal node is picked to have its state changed depends on the node height.
*/
public class RandomWalkIntegerNodeHeightWeightedOperator extends RandomWalkIntegerOperator {
private Parameter internalNodeHeights;
public RandomWalkIntegerNodeHeightWeightedOperator(
Parameter parameter, int windowSize, double weight, Parameter internalNodeHeights){
super(parameter, windowSize, weight);
this.internalNodeHeights = internalNodeHeights;
}
public double doOperation() {
// a random dimension to perturb
int index = MathUtils.randomChoicePDF(internalNodeHeights.getParameterValues());
int newValue = calculateNewValue(index);
parameter.setValue(index, newValue);
return 0.0;
}
//MCMCOperator INTERFACE
public String getOperatorName() {
return "randomWalkIntegerNodeHeightWeighted(" + parameter.getId() + ")";
}
public double getTargetAcceptanceProbability() {
return 0.234;
}
public double getMinimumAcceptanceLevel() {
return 0.1;
}
public double getMaximumAcceptanceLevel() {
return 0.4;
}
public double getMinimumGoodAcceptanceLevel() {
return 0.20;
}
public double getMaximumGoodAcceptanceLevel() {
return 0.30;
}
public String toString() {
return RandomWalkIntegerNodeHeightWeightedOperatorParser.RANDOM_WALK_INT_NODE_HEIGHT_WGT_OP +
"(" + parameter.getId() + ", " + windowSize + ", " + getWeight() + ")";
}
}