static void Main(string[] args)
{
var data = CsvReader.ReadData();
var userId = 186;
//User-Item
KNearestNeighbours kNearestNeighbours = new KNearestNeighbours(0.35);
var nearestNeighbours = kNearestNeighbours.GetNearestNeighbours(data, userId, 25);
var topRatings = GetTopXAmountOfRecommendations.GetTopXAmountOfRatings(8, nearestNeighbours, 3);
//Item-Item
var top5 = ItemItemLogic.RunItemItemMethods(data, userId);
}
private static void RunUserItemMethods(Dictionary <int, Dictionary <int, double> > dictionary)
{
var userId = 186;
var itemId = 514;
KNearestNeighbours kNearestNeighbours = new KNearestNeighbours();
var nearestNeigbours = kNearestNeighbours.GetNearestNeighbours(userId, dictionary[userId], dictionary, 25, 0.35);
foreach (var item in nearestNeigbours)
{
Console.WriteLine("Id: {0} Similarity: {1}", item.Key, item.Similarity);
}
//PredictedRatingCalculations predictedRatingCalculations = new PredictedRatingCalculations();
//var predRating = predictedRatingCalculations.CalculatePredictedRating(itemId, nearestNeigbours, dictionary);
//Console.WriteLine("Predicted Rating: {0}" , predRating);
var topRatings = GetTopXAmountOfRatings(8, nearestNeigbours, dictionary);
foreach (var rating in topRatings)
{
Console.WriteLine("Predicted Rating: {0}", rating);
}
}