/** Computes the mean across all vectors in the input set of vectors */
static Vector average(List<Vector> ps) {
int numVectors = ps.size();
Vector out = new Vector(ps.get(0).elements());
// start from i = 1 since we already copied index 0 above
for (int i = 1; i < numVectors; i++) {
out.addInPlace(ps.get(i));
}
return out.divide(numVectors);
}
