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/*
* hellinger.cpp
* Mothur
*
* Created by westcott on 12/15/10.
* Copyright 2010 Schloss Lab. All rights reserved.
*
*/
#include "hellinger.h"
/***********************************************************************/
EstOutput Hellinger::getValues(vector<SharedRAbundVector*> shared) {
try {
data.resize(1,0);
double sumA = 0.0;
double sumB = 0.0;
//calc the 2 denominators
for (int i = 0; i < shared[0]->getNumBins(); i++) {
sumA += shared[0]->get(i);
sumB += shared[1]->get(i);
}
//calc sum
double sum = 0.0;
for (int i = 0; i < shared[0]->getNumBins(); i++) {
int Aij = shared[0]->get(i);
int Bij = shared[1]->get(i);
double term1 = sqrt((Aij / sumA));
double term2 = sqrt((Bij / sumB));
sum += ((term1 - term2) * (term1 - term2));
}
data[0] = sqrt(sum);
if (isnan(data[0]) || isinf(data[0])) { data[0] = 0; }
return data;
}
catch(exception& e) {
m->errorOut(e, "Hellinger", "getValues");
exit(1);
}
}
/***********************************************************************/
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