// new code to get GOI for communities
// above function is not correct
/*
* public static double ComGOI(Matrix commDensity)
* {
* double GOI = 0.0;
*
*
* return GOI;
* }
*/
public static Pair <double, double> COC(CommCollection cc)
{
double simple_sum = 0, complex_sum = 0;
Matrix CBCO = cc.CommByCommOverlap;
Vector v = CBCO as Vector;
if (CBCO.Cols == 1)
{
return(new Pair <double, double>(0.0, 0.0));
}
double denominator = (double)(((double)CBCO.Cols * ((double)CBCO.Cols - 1)) / 2.0);
if (v != null)
{
Vector w = new Vector(v.Size);
w.Clear();
for (int i = 0; i < v.Size; ++i)
{
for (int j = i + 1; j < v.Size; ++j)
{
w[j] += cc.GetCommByCommOverlap(i, j);
}
}
for (int j = 1; j < v.Size; ++j)
{
double sum = w[j];
simple_sum += (sum / v[j]);
if (v[j] > 1)
{
complex_sum += (sum / (v[j] - 1));
}
}
}
else
{
for (int j = 1; j < CBCO.Rows; ++j)
{
double sum = 0.0;
for (int i = 0; i < j; ++i)
{
sum += CBCO[i, j];
}
simple_sum += sum / CBCO[j, j];
if (CBCO[j, j] > 1)
{
complex_sum += sum / (CBCO[j, j] - 1);
}
}
}
return(new Pair <double, double>(simple_sum / denominator, complex_sum / denominator));
}
public static double AverageBlockSize(CommCollection cc)
{
int sum = 0;
for (int i = 0; i < cc.Count; ++i)
{
sum += cc[i].Size;
}
return((double)sum / (double)cc.Count);
}
public static double AverageCommMembers(CommCollection cc)
{
double sum = 0;
for (int i = 0; i < cc.CommOverlap.Rows; i++)
{
sum += cc.CommOverlap[i, i];
}
return((double)sum / (double)cc.CommOverlap.Rows);
}
public static double NPOL(CommCollection cc, Matrix data)
{
int total_sum = 0;
for (int i = 0; i < cc.Count; i++)
{
total_sum += cc[i].Size * (data.Rows - cc[i].Size);
}
double first_term = 4.0 / (double)(cc.Count * data.Rows * data.Rows);
return(first_term * total_sum);
}
public static double CMOI(CommCollection cc)
{
Matrix O = cc.CommOverlap;
double total_sum = 0;
for (int i = 0; i < O.Rows; i++)
{
for (int j = i + 1; j < O.Rows; j++)
{
if (O[j, j] != 0)
{
total_sum += (double)(O[i, j]) / O[j, j];
}
}
}
double coi = (double)(O.Rows * O.Rows - O.Rows);
if (coi != 0)
{
coi = (total_sum * 2.0) / coi;
}
return(coi);
}
