public void OptimizeUsingEdgeSearch_Test()
{
string function = "x^4+y^4";
Function f = new Parser().ParseFunction(function);
Math_Collection.Basics.Interval intervall = new Math_Collection.Basics.Interval(-4, 4);
Vector pointOfMinimum = Analysis.OptimizeUsingEdgeSearch(f, new Vector(new double[] { 1, 1, 1 }), intervall);
}
public void ApproximatedRootWithGradientMethodWithMinimum_Test()
{
//Example of a function with a minimum
Function func = new Parser().ParseFunction("x^2 + y^2");
Gradient grad = new Gradient(func, true);
Vector rootPoint = new Vector(new double[] { 5, 5 });
Vector actual = Analysis.CalculateRootWithConjugateGradientMethod(grad, rootPoint);
Vector expected = new Vector(new double[] { 0, 0 });
Assert.IsTrue(actual.Equals(expected));
}
public void ApproximatedRoot_Test()
{
string function = "x^2 - 2";
Function f = new Parser().ParseFunction(function);
double startValue = 2;
double epsilon = 0.001;
double expectedRoot = Math.Round(Math.Sqrt(2), 4);
double actualRoot = Math.Round(Analysis.CalulateApproximatedRoot(f, startValue, epsilon), 4);
Assert.IsTrue(IsNearlyEqual(expectedRoot, actualRoot, epsilon));
}
public void ExtremaApproximationWithFibonacciMethod_Test()
{
string function = "x^2";
Function f = new Parser().ParseFunction(function);
int n = 30;
Math_Collection.Basics.Interval intervall = new Math_Collection.Basics.Interval(-16, 16);
// TODO: Epsilon umgebung mit (min-max) / Nn, damit Test nicht fehlschlägt
Vector expected = new Vector(new double[] { 2, 1 });
Vector actual = Analysis.ExtremaApproximatedWithFibonacciMethod(f, intervall, n, Enums.EExtrema.eMinimum);
Assert.AreEqual(expected, actual);
}
public void GradientApproximation_Test()
{
double h = 0.00001;
string function = "(x*y+x^2)+(y*x+y^2)";
Function func = new Parser().ParseFunction(function);
double[] expected = new double[] { 8, 8 };
double[] actual = Analysis.PartialDerivatives_Approximation(func, new double[] { 2, 2 }, h, true);
for (int i = 0; i < actual.Length; i++)
{
Assert.IsTrue(IsNearlyEqual(expected[i], actual[i], h));
}
}
public void DerivationApproximation_Test()
{
double actual = 0.0;
double expected = 0.0;
double h = 0.001;
Parser p = new Parser();
//Function f(x) = 3h
string function = "3";
Function f = p.ParseFunction(function);
expected = 0.0;
actual = Analysis.Derivation_Approximation(f, 2, h);
Assert.IsTrue(IsNearlyEqual(expected, actual, 0));
// f(x) = x^2
function = "x^2";
f = p.ParseFunction(function);
expected = 2.0;
actual = Analysis.Derivation_Approximation(f, 1, h);
Assert.IsTrue(IsNearlyEqual(expected, actual, h));
}
