static void Main(string[] args) { Userpreference up = new Userpreference(); //Introducing a new UserPreference objects, which will execute and calculate Dictionary <int, ArrayList> methodResult = up.ReadDataFile("userItem.data"); //Loading Data from text file ArrayList userIDs = up.GetAllUserIds(methodResult); //Get all available user id's and store the result in a ArrayList int userToCompare = CompareUsers(); BasicOperation(up, methodResult, userToCompare); //Tuple<List<double>, List<double>> userSimilarities = up.FilterMissingTwoUsers(methodResult, usersToCompare[0], usersToCompare[1]); //Fixed users now, needs to be user input //double pearson = up.PearsonCalculation(userSimilarities); //Calculation of the pearson coefficient between two users //Console.WriteLine(pearson); ; }
//functie maken voor missing items checken meerdere private static ArrayList CheckForMissingItems(int userToCompare) { Userpreference up = new Userpreference(); Dictionary <int, ArrayList> methodResult = up.ReadDataFile("userItem.data"); ArrayList userIDs = up.GetAllUserIds(methodResult); if (userIDs.Contains(userToCompare)) { ArrayList missingItemsChosenUser = up.GetMissingItemIds(methodResult, userToCompare); Console.WriteLine("Item Id's with missing rating for this userid:" + userToCompare); if (missingItemsChosenUser.Count > 0) { Console.WriteLine("Missing items for chosen user:"******"none"); return(null); } Console.ReadLine(); return(null); //Andere beoordelingen zelfde item ophalen //Dictionary<int, ArrayList> sd = up.GetItemScoresOtherUsers(methodResult, 103); //foreach (KeyValuePair<int, ArrayList> itemId in sd) //{ // Console.WriteLine("item rating of other users:"); // Console.WriteLine(itemId.Key); // Console.WriteLine(itemId.Value[0]); // Console.WriteLine(itemId.Value[1]); //} //Console.ReadLine(); } else { Console.WriteLine("User does not exist, try again...\n"); CheckForMissingItems(userToCompare); } return(null); }
private static int CompareUsers() { Userpreference up = new Userpreference(); Dictionary <int, ArrayList> methodResult = up.ReadDataFile("userItem.data"); ArrayList userIDs = up.GetAllUserIds(methodResult); Console.WriteLine("Select a User ID"); for (int x = 0; x < userIDs.Count; x++) { Console.WriteLine(userIDs[x]); } int user = Convert.ToInt32(Console.ReadLine()); return(user); }