private static void LogNormalize(int userCount, string playcountsFile, string saveFile)
{
var rating = RatingProvider.Load(playcountsFile);
rating.LogNormalize(userCount);
RatingProvider.Save(saveFile, rating);
}
private static void ConvertToLogEqualWidthFiveScale(int userCount, string playcountsFile, string saveFile)
{
var ratings = RatingProvider.Load(playcountsFile);
ratings.ConvertToLogEqualWidthFiveScale(userCount);
RatingProvider.Save(saveFile, ratings);
}
private static void LoadAndSaveRatings(string playcountsFile, List <IUser> users, List <string> artistLut)
{
var userLut = users.GetLookupTable();
var ratings = RatingProvider.ImportFromDataset(DataFiles.RatingDataset, userLut, artistLut);
users.PopulateWithRatings(ratings, true);
ratings.ExtractFromUsers(users);
RatingProvider.Save(playcountsFile, ratings);
}
private static int LoadFromDataset()
{
Console.WriteLine("Loading users from dataset... {0}", DateTime.Now.ToLongTimeString());
List <string> userLut,
artistLut;
var users = UserProvider.ImportFromDataset(DataFiles.UserDataset, out userLut);
UserProvider.Save(DataFiles.Users, users);
GC.Collect();
Console.WriteLine("Loading artists from dataset... {0}", DateTime.Now.ToLongTimeString());
var artists = ArtistProvider.ImportFromDataset(DataFiles.RatingDataset, out artistLut);
ArtistProvider.Save(DataFiles.Artists, artists);
Console.WriteLine("Loading ratings from dataset... {0}", DateTime.Now.ToLongTimeString());
var ratings = RatingProvider.ImportFromDataset(DataFiles.RatingDataset, userLut, artistLut);
Console.WriteLine("Populating users with ratings... {0}", DateTime.Now.ToLongTimeString());
users.PopulateWithRatings(ratings, true);
GC.Collect();
Console.WriteLine("Extracting ratings from users... {0}", DateTime.Now.ToLongTimeString());
ratings.ExtractFromUsers(users, false);
RatingProvider.Save(DataFiles.Playcounts, ratings);
return(users.Count);
}