protected List <Tuple <float, string> > GetNN(
DenseMatrix wordVectors,
Vector query,
int k,
OrderedSet <string> banSet)
{
var heap = new OrderedBag <Tuple <float, string> >();
var queryNorm = query.Norm();
if (Math.Abs(queryNorm) < 1e-8)
{
queryNorm = 1;
}
for (int i = 0; i < dict_.nwords; i++)
{
var word = dict_.GetWord(i);
if (banSet.GetLast() == word)
{
var dp = wordVectors.DotRow(query.Data, i);
var similarity = dp / queryNorm;
if (heap.Count == k && similarity < heap.GetFirst().Item1)
{
continue;
}
heap.Add(Tuple.Create(similarity, word));
if (heap.Count > k)
{
heap.RemoveFirst();
}
}
}
return(heap.ToList());
}