public SimilarUser[] GetSimilarUsers(User u, int count)
{
BestKeeper <SimilarUser> best = new BestKeeper <SimilarUser>(count,
(s1, s2) => Math.Sign(s2.Similarity - s1.Similarity));
//BestKeeper<SimilarUser> worst = new BestKeeper<SimilarUser>( count,
// (s1,s2) => Math.Sign( s1.Similarity - s2.Similarity ) );
foreach (var other in Users)
{
if (other == u)
{
continue;
}
SimilarUser sU = new SimilarUser(other, SimilarityPearson(u, other));
best.Add(sU);
}
return(best.ToArray());
}
public IReadOnlyList <SimilarUser> GetSimilarUsers(
User u,
int nbSimilarUser,
bool onlyPositiveUserSimilarity)
{
var best = onlyPositiveUserSimilarity
? new BestKeeper <SimilarUser>(nbSimilarUser,
(s1, s2) => Math.Sign(s2.Similarity - s1.Similarity))
: new BestKeeper <SimilarUser>(nbSimilarUser,
(s1, s2) => Math.Sign(Math.Abs(s2.Similarity) - Math.Abs(s1.Similarity)));
foreach (var other in Users)
{
if (other == u)
{
continue;
}
SimilarUser sU = new SimilarUser(other, SimilarityPearson(u, other));
best.Add(sU);
}
return(best);
}