public void FunctionFunctionHimmelblau0()
{
MinimizerNelderMead minimizer = new MinimizerNelderMead(true);
IFunction <double[], double> minimization_function = new FunctionHimmelblau();
IMinimizerHaltingCriterion <Simplex> halting_criterion = new HaltingCriterionIterationsSimplex(1000);
double[] parameters_initial = new double[] { -2, -2 };
double[] initial_vextex_size = new double[] { 1, 1 };
MinimizerResult result = minimizer.Minimize(
minimization_function,
new FunctionContstant <double[], bool>(true),
halting_criterion,
parameters_initial,
initial_vextex_size);
//Any of these are zeros:
// 3.0000, 2.0000 == 0
// -2.8051, 3.1313 == 0
// -3.7793, -3.2832 == 0
// 3.5844, -1.8481 == 0
Assert.AreEqual(-3.7793, result.Simplex.SmallestVertex[0], 0.001);
Assert.AreEqual(-3.2832, result.Simplex.SmallestVertex[1], 0.001);
}
public void FunctionRosenbrock0()
{
MinimizerNelderMead minimizer = new MinimizerNelderMead();
IFunction <double[], double> minimization_function = new FunctionRosenbrock();
IMinimizerHaltingCriterion <Simplex> halting_criterion = new HaltingCriterionIterationsSimplex(1000);
double[] parameters_initial = new double[] { -2, -2 };
double[] initial_vextex_size = new double[] { 1, 1 };
MinimizerResult result = minimizer.Minimize(
minimization_function,
halting_criterion,
parameters_initial,
initial_vextex_size);
// 1.0, 1.0 == 0
Assert.AreEqual(1.0, result.Simplex.SmallestVertex[0], 0.001);
Assert.AreEqual(1.0, result.Simplex.SmallestVertex[1], 0.001);
}
public void MinimizeFunctionBeale0()
{
MinimizerNelderMead minimizer = new MinimizerNelderMead(true);
IFunction <double[], double> minimization_function = new FunctionBeale();
IMinimizerHaltingCriterion <Simplex> halting_criterion = new HaltingCriterionIterationsSimplex(100);
double[] parameters_initial_final = new double[] { 4, 4 };
double[] initial_vextex_size = new double[] { 1, 1 };
MinimizerResult result = minimizer.Minimize(
minimization_function,
halting_criterion,
parameters_initial_final,
initial_vextex_size);
// 3.0, 0.5 == 0
Assert.AreEqual(3.0, result.Simplex.SmallestVertex[0], 0.001);
Assert.AreEqual(0.5, result.Simplex.SmallestVertex[1], 0.001);
}
