/*
* SimpleDistanceMatrix.java
*
* Copyright (c) 2002-2017 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.app.realtime;
import dr.evolution.alignment.PatternList;
import dr.evolution.distance.DistanceMatrix;
/**
* @author Guy Baele
*/
public class SimpleDistanceMatrix extends DistanceMatrix
{
/** constructor */
public SimpleDistanceMatrix()
{
super();
}
/** constructor taking a pattern source */
public SimpleDistanceMatrix(PatternList patterns)
{
super(patterns);
}
/**
* set the pattern source
*/
public void setPatterns(PatternList patterns) {
super.setPatterns(patterns);
final int stateCount = patterns.getStateCount();
}
/**
* Calculate a pairwise distance
*/
protected double calculatePairwiseDistance(int taxon1, int taxon2) {
int state1, state2;
int n = patterns.getPatternCount();
int gapState = patterns.getDataType().getGapState();
int[] pattern;
double weight, distance;
double sumDistance = 0.0;
double sumWeight = 0.0;
for (int i = 0; i < n; i++) {
pattern = patterns.getPattern(i);
state1 = pattern[taxon1];
state2 = pattern[taxon2];
weight = patterns.getPatternWeight(i);
//only count if neither state is a gap
if (state1 != gapState && state2 != gapState) {
if (!dataType.isAmbiguousState(state1) && !dataType.isAmbiguousState(state2) && state1 != state2) {
sumDistance += weight;
}
sumWeight += weight;
}
}
distance = sumDistance / sumWeight;
return distance;
}
}