/// <summary>
/// Calculate similarity and return a list of tuples with the user and how similar it is.
/// </summary>
public IEnumerable <Tuple <User, float> > ListSimilarities(Similarity similarity, float threshold = 1)
{
var users = new List <Tuple <User, float> >();
foreach (var user in Users)
{
var data = new SimilarityList(user.Ratings, User.Ratings, Articles);
var result = (float)similarity.Calculate(data);
if (result < threshold)
{
continue;
}
users.Add(new Tuple <User, float>(user, result));
}
// Sort
users.Sort((x, y) => y.Item2.CompareTo(x.Item2));
return(users);
}
/// <summary>
/// Performs calculation on similarity service.
/// </summary>
private double Calculate(Similarity similarity)
{
return(similarity.Calculate(Data));
}