private static double GridCompute(GridComputingParameter Para)
{
return(Training.PerformCrossValidation(Para.problem, Para.parameter, Para.nrfold));
}
public static int SmartGrid(Problem problem, Parameter parameters, double C_Start, double C_Multi, double Gamma_Start, double Gamma_Multi, string outputFile, int nrfold, out double C, out double Gamma, bool Parallel = true)
{
C = C_Start;
Gamma = Gamma_Start;
double num = -1.7976931348623157E+308;
if (!string.IsNullOrEmpty(outputFile))
{
File.WriteAllText(outputFile, string.Empty);
}
int num2 = 0;
double[,] array = new double[21, 21];
double[] array2 = new double[21]
{
0.0,
0.0,
0.0,
0.0,
0.0,
0.0,
0.0,
0.0,
0.0,
0.0,
C_Start,
0.0,
0.0,
0.0,
0.0,
0.0,
0.0,
0.0,
0.0,
0.0,
0.0
};
double[] array3 = new double[21]
{
0.0,
0.0,
0.0,
0.0,
0.0,
0.0,
0.0,
0.0,
0.0,
0.0,
Gamma_Start,
0.0,
0.0,
0.0,
0.0,
0.0,
0.0,
0.0,
0.0,
0.0,
0.0
};
for (int i = 0; i < 10; i++)
{
array2[9 - i] = array2[10 - i] / C_Multi;
array2[11 + i] = array2[10 + i] * C_Multi;
array3[9 - i] = array3[10 - i] / Gamma_Multi;
array3[11 + i] = array3[10 + i] * Gamma_Multi;
}
Point p = new Point(10, 10);
Point[] array4 = ParameterSelection.FindNeedCompute(array, p, TrendLineDirection.LeftBelow_to_RightHigh);
while (array4.Length > 0)
{
Task <double>[] array5 = new Task <double> [array4.Length];
if (Parallel)
{
for (int j = 0; j < array4.Length; j++)
{
Parameter parameter = (Parameter)parameters.Clone();
parameter.C = array2[array4[j].X];
parameter.Gamma = array3[array4[j].Y];
GridComputingParameter state = new GridComputingParameter(problem, parameter, nrfold);
array5[j] = new Task <double>((object obj) => ParameterSelection.GridCompute((GridComputingParameter)obj), state);
array5[j].Start();
}
}
for (int k = 0; k < array4.Length; k++)
{
double num3;
if (Parallel)
{
num3 = array5[k].Result;
}
else
{
parameters.C = array2[array4[k].X];
parameters.Gamma = array3[array4[k].Y];
num3 = Training.PerformCrossValidation(problem, parameters, nrfold);
}
array[array4[k].X, array4[k].Y] = num3;
Console.Write(string.Format("{0} {1} {2}", array2[array4[k].X], array3[array4[k].Y], num3));
if (!string.IsNullOrEmpty(outputFile))
{
File.AppendAllText(outputFile, string.Format("{0} {1} {2}\n", array2[array4[k].X], array3[array4[k].Y], num3));
}
if (num3 > num)
{
num = num3;
p.X = array4[k].X;
p.Y = array4[k].Y;
C = array2[array4[k].X];
Gamma = array3[array4[k].Y];
Console.WriteLine(" New Maximum!");
}
else
{
Console.WriteLine();
}
num2++;
}
array4 = ParameterSelection.FindNeedCompute(array, p, TrendLineDirection.LeftBelow_to_RightHigh);
}
return(num2);
}
