public static double slopeOne(int userId, int productId)
{
var data = DataParser.write2DArray("./userData.data", ",");
List <int> products = DataParser.getProducts(data);
products.Remove(productId);
Dictionary <int, double> deviations = new Dictionary <int, double>();
foreach (var item in products)
{
deviations.Add(item, ItemItem.deviations(productId, item));
}
//double averageDeviation = deviations.Average((item) => item.Value);
//Console.WriteLine(averageDeviation);
int counter = 0;
double result = 0;
foreach (var deviation in deviations)
{
if (data[userId].ContainsKey(deviation.Key) == true)
{
counter++;
result += data[userId][deviation.Key] + deviation.Value;
}
}
return(result / counter);
}
