//public static double entropy(double inp)
//{
// return (-(inp * Math.Log(inp, 2)) - ((1 - inp) * Math.Log((1 - inp), 2)));
//}
//public static double entropy(disease d,symptom s)
//{
// return (d.py) * (d.symptoms.Contains(s.Number)?(entropy((double)1/d.symptoms.Count)):0) + (d.pn) * (d.symptoms.Contains(s.Number) ? entropy(((double)(65-d.symptoms.Count) / (65))) : 0);
//}
//public static double InformationGain(symptom s,disease d)
//{
// return entropy(s.py) - entropy(d,s);
//}
public static double pck(disease d, symptom s, bool b)
{
if (b)
{
if (s.Disease.Contains(d.Num))
{
return((double)1 / s.Disease.Count);
}
else
{
return(0);
}
}
else
{
if (s.Disease.Contains(d.Num))
{
return(0);
}
else
{
return((double)1 / (9 - s.Disease.Count));
}
}
}
public data(int i, object obj)
{
if (i == 0)
{
ic = null;
d = null;
s = (symptom)obj;
}
else if (i == 1)
{
ic = null;
s = null;
d = (disease)obj;
}
else if (i == 2)
{
ic = (ic)obj;
s = null;
d = null;
}
else
{
ic = null;
s = null;
d = null;
}
}
private Node insert(Node par, diseases d, List <symptom> used)
{
//Console.WriteLine(d);
if (d.Count == 1)
{
//Console.WriteLine("here"+d);
//Console.WriteLine("disease\r\n"+d);
if (!d[0].Isic)
{
return(new Node(par, 1, d[0]));
}
else
{
return(new Node(par, 2, AllIces.CastToIc(d[0])));
}
}
else
{
List <symptom> passused = new List <symptom>();
passused.AddRange(used);
diseases passdisyes;
diseases passdisno;
symptoms PossibleSymptoms = AllSymptoms.SearchForSymptoms(d, passused);
statics.H(d, PossibleSymptoms);
PossibleSymptoms.sort();
//Console.WriteLine(PossibleSymptoms.Count+" "+d.Count);
symptom ThisSymptom = PossibleSymptoms[statics.Ran(PossibleSymptoms)];
while (ThisSymptom.Disease.Count >= d.Count)
{
int rand = statics.Ran(PossibleSymptoms);
//Console.WriteLine(rand);
ThisSymptom = PossibleSymptoms[rand + 2];
}
//symptom ThisSymptom = PossibleSymptoms[0];
//Console.WriteLine("passs");
passused.Add(ThisSymptom);
//Console.WriteLine("symptoms" + d+"_________\r\n"+ThisSymptom);
//Console.WriteLine("alld"+d.Count);
passdisyes = d.SearchForDisease(ThisSymptom.Disease);
passdisno = d.Rest(ThisSymptom.Disease);
//Console.WriteLine("yesd"+passdisyes.Count+" nod"+passdisno.Count);
Node hold = new Node(par, 0, ThisSymptom);
hold.yes = insert(hold, passdisyes, passused);
hold.no = insert(hold, passdisno, passused);
return(hold);
}
}
public static double H(diseases d, symptom s)
{
double a = 0, b = 0;
foreach (var item in d)
{
if (pck(item, s, true) != 0)
{
a += (pck(item, s, true) * Math.Log(pck(item, s, true), 2));
}
if (pck(item, s, false) != 0)
{
b += (pck(item, s, false) * Math.Log(pck(item, s, false), 2));
}
//Console.WriteLine(a + " " + b);
}
return((s.py * -a) + (s.pn * -b));
}
