public void TestMethod()
{
var arr1 = new double[] { 10, 3, 18, -1, 20, 10, 3 }.ToList();
var arr2 = new double[] { 15, 7, 0, 10, 25, 9 }.ToList();
RankSelection rs = new RankSelection();
var fstSelectionNumber = rs.AddSelection(arr1);
var scndSelectionNumber = rs.AddSelection(arr2);
}
public override double GetCoef()
{
var xRanged = new RankSelection();
xRanged.AddSelection(x);
var yRanged = new RankSelection();
yRanged.AddSelection(y);
double coef = 0;
List <PointD> unionSeriaSortedByX =
xRanged.ranks.Zip(yRanged.ranks.ToList(), (x, y) => new PointD(x, y)).OrderBy(p => p.X).ToList();
List <double> rx = unionSeriaSortedByX.Select(p => p.X).ToList();
List <double> ry = unionSeriaSortedByX.Select(p => p.Y).ToList();
unionSeriaSortedByX.Select(p => p.X).ToList();
double S = 0;
for (int i = 0; i < N - 1; i++)
{
for (int j = i + 1; j < N; j++)
{
if (rx[i] != rx[j])
{
S += ry[j].CompareTo(ry[i]);
}
}
}
var C = xRanged.Ranks.Where(r => r.Count > 1).Sum(xr => xr.Count * (xr.Count - 1)) / 2;
var D = yRanged.Ranks.Where(r => r.Count > 1).Sum(yr => yr.Count * (yr.Count - 1)) / 2;
coef = S / Math.Sqrt((0.5 * N * (N - 1) - C) * (0.5 * N * (N - 1) - D));
return(coef);
}
public override double GetCoef()
{
var xRanged = new RankSelection();
xRanged.AddSelection(x);
var yRanged = new RankSelection();
yRanged.AddSelection(y);
double coef = 0;
double rangedSum = 0;
for (int i = 0; i < N; i++)
{
double xiRank = xRanged.Selection.Where(itm => itm.value == x[i]).First().rank;
double yiRank = yRanged.Selection.Where(itm => itm.value == y[i]).First().rank;
rangedSum += (xiRank - yiRank) * (xiRank - yiRank);
}
if (xRanged.Ranks.Where(r => r.Items.Count > 1).Count() == 0 &&
yRanged.Ranks.Where(r => r.Items.Count > 1).Count() == 0)
{
coef = 1 - (6 * rangedSum) / (N * (N * N - 1));
}
else
{
var A = xRanged.Ranks.Where(r => r.Items.Count > 1).Sum(x => x.Count * x.Count * x.Count - x.Count) / 12;
var B = yRanged.Ranks.Where(r => r.Items.Count > 1).Sum(y => y.Count * y.Count * y.Count - y.Count) / 12;
double NsExp = N * (N * N - 1) / 6;
double top = NsExp - rangedSum - A - B;
double bottom = Math.Sqrt((NsExp - 2 * A) * (NsExp - 2 * B));
coef = top / bottom;
}
return(coef);
}