/*
* MoveLinkageGroup.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.evolution.util.Taxon;
import dr.evomodel.tree.HiddenLinkageModel;
import dr.evomodelxml.operators.MoveLinkageGroupParser;
import dr.inference.operators.SimpleMCMCOperator;
import dr.math.MathUtils;
/**
* @author Aaron Darling
*/
public class MoveLinkageGroup extends SimpleMCMCOperator {
HiddenLinkageModel hlm;
int readCount;
int groupCount;
public MoveLinkageGroup(HiddenLinkageModel hlm, double weight){
this.hlm = hlm;
readCount = hlm.getData().getReadsTaxa().getTaxonCount();
groupCount = hlm.getLinkageGroupCount();
setWeight(weight);
}
public double doOperation() {
// pick a read uniformly at random, add it to a linkage group uniformly at random
int r = MathUtils.nextInt(readCount);
Taxon read = hlm.getData().getReadsTaxa().getTaxon(r);
int g=hlm.getLinkageGroupId(read);
int newGroup = MathUtils.nextInt(groupCount);
hlm.moveReadGroup(read, g, newGroup);
// moves are symmetric -- same forward and backward proposal probabilities
double logHastings = 0.0;
return logHastings;
}
public String getOperatorName() {
return MoveLinkageGroupParser.MOVE_LINKAGE_GROUP + "(" + hlm.getId() + ")";
}
public String getPerformanceSuggestion() {
return "Ask Aaron Darling to write a better operator";
}
}