public override void Algorithm()
{
SupportVectors.Clear();
SupportVectors.Capacity = 0;
// Save support vectors indexes
for (int i = 0; i < Solver.lagrangians.Length; ++i)
{
if (Solver.lagrangians[i] > 0)
{
SupportVectors.Add(i);
}
}
foreach (var i in SupportVectors)
{
foreach (var j in SupportVectors)
{
Lambda += Labels[i] * Labels[j] * Solver.lagrangians[i] * Solver.lagrangians[j] * KernelMatrix[i, j];
}
}
int chosen = SupportVectors.FirstOrDefault();
B = Labels[chosen] * Lambda;
foreach (var i in SupportVectors)
{
B -= Solver.lagrangians[i] * Labels[i] * KernelMatrix[chosen, i];
}
Margin = Math.Sqrt(Lambda);
}
public override void Algorithm()
{
SupportVectors.Clear();
SupportVectors.Capacity = 0;
// Save support vectors indexes
for (int i = 0; i < Solver.lagrangians.Length; ++i)
{
if (Solver.lagrangians[i] > 0)
{
SupportVectors.Add(i);
}
}
int indexi = -1, indexj = -1;
foreach (var i in SupportVectors)
{
if ((-1.0) / (Nu * Values.Length) < Solver.lagrangians[i] * Labels[i] && Solver.lagrangians[i] * Labels[i] < 0)
{
indexi = i;
}
if (0 < Solver.lagrangians[i] * Labels[i] && Solver.lagrangians[i] * Labels[i] < 1.0 / (Nu * Values.Length))
{
indexj = i;
}
foreach (var j in SupportVectors)
{
Lambda += Labels[i] * Labels[j] * Solver.lagrangians[i] * Solver.lagrangians[j] * KernelMatrix[i, j];
}
}
Lambda = Math.Sqrt(Lambda) / 2.0;
double left = 0, right = 0;
foreach (var k in SupportVectors)
{
left += Solver.lagrangians[k] * Labels[k] * KernelMatrix[k, indexi];
right += Solver.lagrangians[k] * Labels[k] * KernelMatrix[k, indexj];
}
B = -Lambda * (left + right);
Margin = 2 * Lambda * right + B;
}
