public void NegCubic()
{
// maximizes a cubic
Status status = MinimizeGolden.Min(x => - x * (x - 2) * (x - 1), 0, 3);
Assert.True(status.converged);
Assert.AreEqual(3, status.argmin, EPS);
}
public void SqrtAbs()
{
// Minimizes sqrt(|x|)
Status status = MinimizeGolden.Min(x => Math.Sqrt(Math.Abs(x)), -3, 3);
Assert.True(status.converged);
Assert.AreEqual(0.0, status.argmin, EPS);
Assert.AreEqual(0.0, status.minimum, 1e-3);
}
public void Parabola()
{
// Succeeds out on bounded minimization of -x^2
Status status = MinimizeGolden.Min(x => - x * x, -1, 2);
Assert.AreEqual(2, status.argmin, EPS);
Assert.AreEqual(-4, status.minimum, EPS);
Assert.True(status.converged);
}
public void NegHyperbola()
{
// Minimizes -1 / (x - 1) in [0, 2]
Status status = MinimizeGolden.Min(x => - 1.0f / (x - 1.0f), 0, 2);
Assert.AreEqual(1.0, status.argmin, EPS);
Assert.True(status.converged);
Assert.AreEqual(41, status.iterations);
}
public void Tol()
{
// returns answer if tolerance not met
Status status = MinimizeGolden.Min(x => x * (x - 2.0), 0, 3, 0, 200);
Assert.AreEqual(200, status.iterations);
Assert.AreEqual(-1.0, status.minimum, EPS);
Assert.AreEqual(1.0, status.argmin, EPS);
Assert.False(status.converged);
}
