private void Helper2(IElementalAccessMatrix A, IElementalAccessVector b,
IElementalAccessVector x, ILinearSolver solver, IPreconditioner M, ILinearIteration iter)
{
Random r = new Random();
double K = r.NextDouble(), f = r.NextDouble(), gl = r.NextDouble(), gr = r.NextDouble();
//assemble(A, b, K, f);
//boundary(A, b, x, gl, gr);
A.SetValue(0, 0, 1);
A.SetValue(0, 1, 1);
A.SetValue(0, 2, 1.3);
A.SetValue(1, 0, -0.5);
A.SetValue(1, 1, -0.25);
A.SetValue(1, 2, -1.25);
A.SetValue(2, 0, 2.5);
A.SetValue(2, 1, 3.25);
A.SetValue(2, 2, -1.25);
b.SetValue(0, 1.25);
b.SetValue(1, 3.75);
b.SetValue(1, -2.35);
double[] ans = solve(A, b, x, solver, M, iter);
//double[] ref_Renamed = reference(b.Length - 1, K, f, gl, gr);
//checkEqual(ans, ref_Renamed);
Console.WriteLine("!: " + solver + " " + M + " " + iter + " " + x.GetValue(0) + " " + x.GetValue(1) + " " + x.GetValue(2));
Blas.Default.Zero(A);
Blas.Default.Zero(b);
Blas.Default.Zero(x);
}
/// <summary> Column-wise assembly using set</summary>
/// <param name="nu">Maximum bandwidth on each column
/// </param>
/// <returns> Dense representation (not a direct copy)
/// </returns>
public static double[,] setAssembleColumnMatrix(IElementalAccessMatrix A, int nu)
{
int n = A.RowCount, m = A.ColumnCount;
double[,] data = new double[n, m];
// for (int i = 0; i < n; i++)
// {
// data[i] = new double[m];
// }
System.Random r = new System.Random();
// Construct the matrix
for (int i = 0; i < m; ++i)
{
for (int j = 0; j < nu; ++j)
{
int ind = TesterUtilities.getInt(n, r);
double entry = r.NextDouble();
data[ind, i] = entry;
A.SetValue(ind, i, entry);
}
}
return(data);
}
private void boundary(IElementalAccessMatrix A, IElementalAccessVector b,
IElementalAccessVector x, double gl, double gr)
{
int n = b.Length - 1;
int[] boundary = new int[] { 0, n };
double[] boundaryV = new double[] { gl, gr };
x.SetValues(boundary, boundaryV);
b.SetValues(boundary, boundaryV);
A.SetValue(0, 0, 1);
A.SetValue(0, 1, 0);
A.SetValue(n, n, 1);
A.SetValue(n, n - 1, 0);
}
private void grad(IElementalAccessMatrix dy, IElementalAccessVector x)
{
IElementalAccessVector y0 = new DenseVector(x.Length);
IElementalAccessVector y = new DenseVector(x.Length);
model(y0, x);
for (int i = 0; i < x.Length; i++)
{
x.AddValue(i, 0.000001);
model(y, x);
for (int j = 0; j < x.Length; j++)
{
dy.SetValue(j, i, (y.GetValue(j) - y0.GetValue(j)) / 0.000001);
}
x.AddValue(i, -0.000001);
}
}
/// <summary> Row-wise assembly using setValue</summary>
/// <param name="nu">Maximum bandwidth on each row
/// </param>
/// <returns> Dense representation (not a direct copy)
/// </returns>
public static double[,] SetAssembleRowMatrix(IElementalAccessMatrix A, int nu)
{
int n = A.RowCount, m = A.ColumnCount;
double[,] data = new double[n, m];
// for (int i = 0; i < n; i++)
// {
// data[i] = new double[m];
// }
Random r = new Random();
for (int i = 0; i < n; ++i)
{
for (int j = 0; j < nu; ++j)
{
int ind = TesterUtilities.getInt(m, r);
double entry = r.NextDouble();
data[i, ind] = entry;
A.SetValue(i, ind, entry);
}
}
return(data);
}
