public static void Run(double threshhold, int targetUser, IDistance iDistance, Dictionary <int, double[, ]> dataSet, int K)
{
neighbors = new Dictionary <int, double>();
var userRatings = dataSet[targetUser];
Dictionary <int, List <Tuple <int, double> > > convertedDataSet = ConvertToDictionary.ConvertData(dataSet);
foreach (var userID in dataSet.Keys)
{
if (userID != targetUser)
{
double similarity = iDistance.ComputeDistance(userRatings, dataSet[userID]);
if (similarity > threshhold)
{
if (hasMoreProductRated(targetUser, userID, convertedDataSet))
{
neighbors.Add(userID, similarity);
}
}
}
}
var sorted = neighbors.OrderByDescending(x => x.Value).ToDictionary(x => x.Key, x => x.Value).Take(K);
// var sorted = from pair in neighbors
// orderby pair.Value descending
// select pair;
foreach (var neighbor in sorted)
{
Console.WriteLine("Neighbor id:" + neighbor.Key + ", similarity " + neighbor.Value);
}
}
public static void IterateSimilarity(Dictionary <int, double[, ]> dataSet, int targetUser, IDistance iDistance)
{
var userRatings = dataSet[targetUser];
foreach (var userID in dataSet.Keys)
{
if (userID != targetUser)
{
Console.WriteLine("UserId:" + userID + ", The similarity is: " + iDistance.ComputeDistance(userRatings, dataSet[userID]));
}
}
}
