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);
}
//Asks the user for input; What kind of operation would the user want to execute?
public static void BasicOperation(Userpreference up, Dictionary <int, ArrayList> methodResult, int userToCompare)
{
Console.WriteLine("Hit a key, pearson will be executed");
string answer = Console.ReadLine();
Dictionary <int, double> pearsonResults = up.GetAllPearsons(methodResult, userToCompare);
int xx = 0;
Dictionary <int, double> bestPearsons = new Dictionary <int, double>();
foreach (KeyValuePair <int, double> item in pearsonResults)
{
if (xx < 3)
{
bestPearsons.Add(item.Key, item.Value);
xx++;
}
Console.WriteLine("UserID: " + item.Key + ", pearson: " + item.Value);
}
Console.ReadLine();
Console.WriteLine("Hit a key, Missing items of chosen user will be found");
string answer2 = Console.ReadLine();
ArrayList missingItemsChosenUser = CheckForMissingItems(userToCompare);
Dictionary <int, int> missingItemsBothUsers = new Dictionary <int, int>(); //store items missing in both compared users
foreach (ArrayList item in missingItemsChosenUser)
{
foreach (KeyValuePair <int, double> record in bestPearsons)
{
ArrayList missing = CheckForMissingItems(record.Key);
if (missing.Contains(item))
{
var index = missing.IndexOf(item);
missingItemsBothUsers.Add(record.Key, Convert.ToInt32((missing[index].ToString())));
}
}
}
Console.ReadLine();
Console.ReadLine();
//next step - Pak de rates van persoon y die bij persoon x ontbreken, doe per rate (pearson*rate) / pearson en sla uitkomst op als de nieuwe rate voor gebruiker x
}
