public double[] getPrincipalCoordinate(int index) {
if (index > numberOfPositiveEigenvalues - 1) return null;
double eval = Math.sqrt(eigenDecomp.getEigenvalue(eigenSort[index]));
int ntaxa = myDistanceMatrix.numberOfTaxa();
double[] pc = new double[ntaxa];
for (int i = 0; i < ntaxa; i++) pc[i] = eigenVectors.get(i, eigenSort[index]) * eval;
return pc;
}
public double getEigenvalue(int index) {
return eigenDecomp.getEigenvalue(eigenSort[index]);
}