@Override
public void map(Chunk response, Chunk weight, Chunk offset) {
for (int i = 0; i < response._len; ++i) {
if (response.isNA(i)) continue;
double w = weight.atd(i);
if (w == 0) continue;
double y = response.atd(i);
double o = offset.atd(i);
_num += _dist.initFNum(w, o, y);
_denom += _dist.initFDenom(w, o);
}
}
public double initialValue() {
if (_dist.distribution == Distribution.Family.multinomial)
return -0.5 * new Distribution(Distribution.Family.bernoulli).link(_num / _denom);
else return _dist.link(_num / _denom);
}