private Dictionary <int, double> GetDistance(IDistance distance)
{
// userId with simularity
Dictionary <int, double> userDis = new Dictionary <int, double>();
// Getting other user with the same items rated
foreach (KeyValuePair <int, Dictionary <int, double> > item in _dict)
{
int curUser = item.Key;
List <double> p = new List <double>();
List <double> q = new List <double>();
foreach (KeyValuePair <int, double> curArticle in item.Value)
{
if (curUserItems.ContainsKey(curArticle.Key))
{
p.Add(curUserItems[curArticle.Key]);
q.Add(curArticle.Value);
}
}
// calculate the simularity
double dis = distance.Calculate(p.ToArray(), q.ToArray());
userDis.Add(item.Key, dis);
}
Console.WriteLine($"Interface = {distance.GetType()} Distance of items:");
Ranking(userDis);
return(userDis);
}
public override List <string> DescribeSelf()
{
List <String> output = new List <string>();
var state = states.FirstOrDefault().Value;
output.Add("Classification using k-Nearest Neighbors [" + state.machine.GetType().Name + "] with K = " + setup.kNN_k + ".");
output.Add("Distance structure [" + _distance.GetType().Name + "].");
output.Add("Trained with [" + state.data.NumberOfCases + "] cases.");
return(output);
}
