public void ResetCalculationState()
{
var criterium = new ResidualStopCriterium(1e-3, 10);
Assert.IsNotNull(criterium, "There should be a criterium");
var solution = new DenseVector(new[] {new Complex(0.001, 1), new Complex(0.001, 1), new Complex(0.002, 1)});
var source = new DenseVector(new[] {new Complex(0.001, 1), new Complex(0.001, 1), new Complex(0.002, 1)});
var residual = new DenseVector(new[] {new Complex(1.000, 0), new Complex(1.000, 0), new Complex(2.001, 0)});
var status = criterium.DetermineStatus(5, solution, source, residual);
Assert.AreEqual(IterationStatus.Continue, status, "Should be running");
criterium.Reset();
Assert.AreEqual(IterationStatus.Continue, criterium.Status, "Should not have started");
}
public void DetermineStatusWithSourceNaN()
{
var criterium = new ResidualStopCriterium(1e-3, 10);
Assert.IsNotNull(criterium, "There should be a criterium");
var solution = new DenseVector(new[] {new Complex(1.0, 1), new Complex(1.0, 1), new Complex(2.0, 1)});
var source = new DenseVector(new[] {new Complex(1.0, 1), new Complex(1.0, 1), new Complex(double.NaN, 1)});
var residual = new DenseVector(new[] {new Complex(1000.0, 1), new Complex(1000.0, 1), new Complex(2001.0, 1)});
var status = criterium.DetermineStatus(5, solution, source, residual);
Assert.AreEqual(IterationStatus.Diverged, status, "Should be diverged");
}
public void DetermineStatusWithNonMatchingSourceVectorThrowsArgumentException()
{
var criterium = new ResidualStopCriterium(1e-8, 50);
Assert.IsNotNull(criterium, "There should be a criterium");
Assert.Throws<ArgumentException>(() => criterium.DetermineStatus(
1,
DenseVector.Create(3, i => 4),
DenseVector.Create(4, i => 4),
DenseVector.Create(3, i => 4)));
}
public void DetermineStatusWithIllegalIterationNumberThrowsArgumentOutOfRangeException()
{
var criterium = new ResidualStopCriterium(1e-8, 50);
Assert.IsNotNull(criterium, "There should be a criterium");
Assert.Throws<ArgumentOutOfRangeException>(() => criterium.DetermineStatus(
-1,
DenseVector.Create(3, i => 4),
DenseVector.Create(3, i => 5),
DenseVector.Create(3, i => 6)));
}
public void DetermineStatusWithConvergenceAtFirstIteration()
{
var criterium = new ResidualStopCriterium();
Assert.IsNotNull(criterium, "There should be a criterium");
var solution = new DenseVector(new[] {Complex.One, Complex.One, Complex.One});
var source = new DenseVector(new[] {Complex.One, Complex.One, Complex.One});
var residual = new DenseVector(new[] {Complex.Zero, Complex.Zero, Complex.Zero});
var status = criterium.DetermineStatus(0, solution, source, residual);
Assert.AreEqual(IterationStatus.Converged, status, "Should be done");
}
public void DetermineStatus()
{
var criterium = new ResidualStopCriterium(1e-3, 10);
Assert.IsNotNull(criterium, "There should be a criterium");
// the solution vector isn't actually being used so ...
var solution = new DenseVector(new[] {new Complex(double.NaN, double.NaN), new Complex(double.NaN, double.NaN), new Complex(double.NaN, double.NaN)});
// Set the source values
var source = new DenseVector(new[] {new Complex(1.000, 1), new Complex(1.000, 1), new Complex(2.001, 1)});
// Set the residual values
var residual = new DenseVector(new[] {new Complex(0.001, 0), new Complex(0.001, 0), new Complex(0.002, 0)});
var status = criterium.DetermineStatus(5, solution, source, residual);
Assert.AreEqual(IterationStatus.Continue, status, "Should still be running");
var status2 = criterium.DetermineStatus(16, solution, source, residual);
Assert.AreEqual(IterationStatus.Converged, status2, "Should be done");
}