Accord.Tests.Math.SubplexTest.ConstructorTest4 C# (CSharp) Method

        public void ConstructorTest4()
        {
            // Weak version of Rosenbrock's problem.
            var function = new NonlinearObjectiveFunction(2, x =>
                Math.Pow(x[0] * x[0] - x[1], 2.0) + Math.Pow(1.0 + x[0], 2.0));

            Subplex solver = new Subplex(function);

            Assert.IsTrue(solver.Minimize());
            double minimum = solver.Value;
            double[] solution = solver.Solution;

            Assert.AreEqual(2, solution.Length);
            Assert.AreEqual(0, minimum, 1e-10);
            Assert.AreEqual(-1, solution[0], 1e-5);
            Assert.AreEqual(1, solution[1], 1e-4);

            double expectedMinimum = function.Function(solver.Solution);
            Assert.AreEqual(expectedMinimum, minimum);
        }