public void SparseSample_ComplexFloat_Identity()
{
NumericsConfiguration.NativeProviderPath = @"C:\Program Files (x86)\Extreme Optimization\Numerical Libraries for .NET\bin\Net40";
NumericsConfiguration.Providers.RegisterSinglePrecisionProvider();
NumericsConfiguration.AutoLoadNativeProviders = true;
CoreImplementations <float> .UseNative();
Console.WriteLine(CoreImplementations <Complex <float> > .LinearAlgebra.Name);
SparseCompressedColumnMatrix <Complex <float> > matrixA = Matrix.CreateSparse <Complex <float> >(3, 3);
matrixA.SetValue(new Complex <float>(1, 0), 0, 0);
matrixA.SetValue(new Complex <float>(1, 0), 1, 1);
matrixA.SetValue(new Complex <float>(1, 0), 2, 2);
Vector <Complex <float> > vectorB = Vector.Create(new Complex <float>(1.0f, 0), new Complex <float>(2.0f, 0), new Complex <float>(3.0f, 0));
IterativeSparseSolver <Complex <float> > solver = new BiConjugateGradientSolver <Complex <float> >(matrixA);
DenseVector <Complex <float> > resultVector = solver.Solve(vectorB);
Console.WriteLine("Result: {0}", resultVector);
Console.WriteLine("Solved in {0} iterations.", solver.IterationsNeeded);
Console.WriteLine("Estimated error: {0}", solver.SolutionReport.Error);
// With incomplete LU preconditioner
solver.Preconditioner = new IncompleteLUPreconditioner <Complex <float> >(matrixA);
resultVector = solver.Solve(vectorB);
Console.WriteLine("Result: {0}", resultVector);
Console.WriteLine("Solved in {0} iterations.", solver.IterationsNeeded);
Console.WriteLine("Estimated error: {0}", solver.EstimatedError);
}
public void ExecuteSample()
{
// The line below sets the path where the native assemblies
// are located. The "XO_LIBRARY_PATH" environment variable
// points here, too.
NumericsConfiguration.NativeProviderPath =
@"C:\Program Files (x86)\Extreme Optimization\Numerical Libraries for .NET\bin\Net40";
// Register the single precision providers.
NumericsConfiguration.Providers.RegisterSinglePrecisionProvider();
NumericsConfiguration.AutoLoadNativeProviders = true;
CoreImplementations <float> .UseNative();
// Which provider are we using?
Console.WriteLine(CoreImplementations <Complex <float> > .LinearAlgebra.Name);
int N = 228724; // size
int K = 96; // non-zeros per column
// Create some random matrices. Code is below.
// Use a seed so we can reproduce the same values.
NumericsConfiguration.DefaultRandomNumberGenerator = new Extreme.Mathematics.Random.MersenneTwister(117);
var matrixA = CreateSparseRandom(N, K);
var vectorB = CreateRandom(N);// CreateRandom(N);
// Now run the solver with and without preconditioner:
var sw = Stopwatch.StartNew();
var solver = new BiConjugateGradientSolver <Complex <float> >(matrixA);
Console.WriteLine("Starting solve...");
Vector <Complex <float> > resultVector;
resultVector = solver.Solve(vectorB);
sw.Stop();
Console.WriteLine("Result: {0}", resultVector.GetSlice(0, 10));
Console.WriteLine("Solved in {0} iterations.", solver.IterationsNeeded);
Console.WriteLine("Estimated error: {0}", solver.SolutionReport.Error);
Console.WriteLine("Total time: {0} s", sw.Elapsed.TotalSeconds);
// With incomplete LU preconditioner
sw.Restart();
solver.Preconditioner = new IncompleteLUPreconditioner <Complex <float> >(matrixA);
resultVector = solver.Solve(vectorB);
sw.Stop();
Console.WriteLine("Result: {0}", resultVector.GetSlice(0, 10));
Console.WriteLine("Solved in {0} iterations.", solver.IterationsNeeded);
Console.WriteLine("Estimated error: {0}", solver.EstimatedError);
Console.WriteLine("Total time: {0} s", sw.Elapsed.TotalSeconds);
Console.WriteLine("Press any key to exit.");
Console.ReadLine();
}
