} // AG
public CubicSplineInterpolator(Vector <double> xarr,
Vector <double> yarr,
// CubicSplineBC BCType,
int BCType,
// double alpha = 0.0, double beta = 0.0)
double alpha, double beta) : base(xarr, yarr)
{
// Arrays must have the same size
x = xarr;
y = yarr;
N = xarr.Size - 1;
type = BCType;
a = alpha; // LHS
b = beta; // RHS
// Redundant internal arrays
int si = x.MinIndex + 1; // !! start index
// cout << "si" << si;
// int t; cin >> t;
double defVal = 0.0;
// Calculate array of offset
h = new Vector <double>(N, si, defVal);
for (int j = 1; j <= N; j++)
{
h[j] = x[j] - x[j - 1];
}
// print(h); cin >> t;
// All arrays have start index 1
// Compared to the equations in the book, M(j) --> M(j+1)
M = new Vector <double>(N + 1, si, defVal); // Solution
A = new Vector <double>(N + 1, si, defVal);
B = new Vector <double>(N + 1, si, defVal + 2.0);
C = new Vector <double>(N + 1, si, defVal);
r = new Vector <double>(N + 1, si, defVal);
// Calculate the elements
calculateVectors();
// // / print(A); print(B); print(C); int y; cin >> y;
LUTridiagonalSolver mySolver = new LUTridiagonalSolver(A, B, C, r);
// The matrix must be diagonally dominant; we call the
// assert macro and the programs stops
// assert (mySolver.diagonallyDominant() == true); C++!
M = mySolver.solve();
}
public override void Ini(IEnumerable <double> xarr, IEnumerable <double> yarr)
{
x = new Vector <double>(xarr.ToArray(), 0);
y = new Vector <double>(yarr.ToArray(), 0);
N = xarr.Count() - 1;
type = 1;
a = 0; // LHS
b = 0; // RHS
// Redundant internal arrays
int si = x.MinIndex + 1; // !! start index
// cout << "si" << si;
// int t; cin >> t;
double defVal = 0.0;
// Calculate array of offset
h = new Vector <double>(N, si, defVal);
for (int j = 1; j <= N; j++)
{
h[j] = x[j] - x[j - 1];
}
// print(h); cin >> t;
// All arrays have start index 1
// Compared to the equations in the book, M(j) --> M(j+1)
M = new Vector <double>(N + 1, si, defVal); // Solution
A = new Vector <double>(N + 1, si, defVal);
B = new Vector <double>(N + 1, si, defVal + 2.0);
C = new Vector <double>(N + 1, si, defVal);
r = new Vector <double>(N + 1, si, defVal);
// Calculate the elements
calculateVectors();
// // / print(A); print(B); print(C); int y; cin >> y;
LUTridiagonalSolver mySolver = new LUTridiagonalSolver(A, B, C, r);
// The matrix must be diagonally dominant; we call the
// assert macro and the programs stops
// assert (mySolver.diagonallyDominant() == true); C++!
M = mySolver.solve();
}
override public void calculate()
{ // Tells how to calculate sol. at n+1
// In general we need to solve a tridiagonal system
double tmp1, tmp2;
for (int i = F.MinIndex; i <= F.MaxIndex; i++)
{
tmp1 = (k * fitting_factor(xarr[i + 1], tnow));
tmp2 = (0.5 * k * h * (pde.convection(xarr[i + 1], tnow)));
// Coefficients of the U terms
A[i] = tmp1 - tmp2;
B[i] = -h2 - (2.0 * tmp1) + (k * h2 * (pde.zeroterm(xarr[i + 1], tnow)));
C[i] = tmp1 + tmp2;
F[i] = h2 * (k * (pde.RHS(xarr[i + 1], tnow)) - vecOld[i + 1]); //?&
}
// Correction term for RHS
F[1] -= A[1] * vecNew[vecNew.MinIndex];
F[J - 1] -= C[J - 1] * vecNew[vecNew.MaxIndex];
// Now solve the system of equations
LUTridiagonalSolver mySolver = new LUTridiagonalSolver(A, B, C, F);
// The matrix must be diagonally dominant; we call the
// assert macro and the programs stops
Vector <double> solution = mySolver.solve();
for (int ii = vecNew.MinIndex + 1; ii <= vecNew.MaxIndex - 1; ii++)
{
vecNew[ii] = solution[ii - 1];
}
}
static void Main(string[] args)
{
// Jagged arrays
// Lower triangular matrix
int NR = 10;
int NC = 10;
double[][] lowerTriangular = new double[NR][];
for (int j = 0; j < NC; j++)
{
lowerTriangular[j] = new double[j + 1];
}
// Generic arrays for starters
NR = 4;
NC = 4;
//MatrixTwoArrayImpl<double> myMatrixStructure = new MatrixTwoArrayImpl<double>(NR, NC);
UpperTriangularImpl <double> myMatrixStructure = new UpperTriangularImpl <double>(NR, NC);
GenericMatrix <double, MatrixTwoArrayImpl <double> > myMatrix = new GenericMatrix <double, MatrixTwoArrayImpl <double> >(NR, NC);
myMatrix.extendedPrint();
for (int i = myMatrix.MinRowIndex; i <= myMatrix.MaxRowIndex; i++)
{
for (int j = myMatrix.MinColumnIndex; j <= myMatrix.MaxColumnIndex; j++)
{
myMatrix[i, j] = -1;
}
}
myMatrix.extendedPrint();
MatrixOneArrayImpl <double> myMatrixStructure2 = new MatrixOneArrayImpl <double>(NR, NC);
GenericMatrix <double, MatrixOneArrayImpl <double> > myMatrix2 = new GenericMatrix <double, MatrixOneArrayImpl <double> >(NR, NC);
myMatrix2.extendedPrint();
for (int i = myMatrix2.MinRowIndex; i <= myMatrix2.MaxRowIndex; i++)
{
for (int j = myMatrix2.MinColumnIndex; j <= myMatrix2.MaxColumnIndex; j++)
{
myMatrix2[i, j] = 2;
}
}
myMatrix2[myMatrix2.MinRowIndex, myMatrix2.MinColumnIndex] = 99;
myMatrix2[myMatrix2.MaxRowIndex, myMatrix2.MaxColumnIndex] = 98;
myMatrix2.extendedPrint();
// Algebra and matrix manipulation
int J = 3;
Vector <double> a = new Vector <double>(J, 1, 1.0);
Vector <double> b = new Vector <double>(J, 1, 2.0);
Vector <double> c = new Vector <double>(J, 1, 1.0);
Vector <double> r = new Vector <double>(J, 1, 0.0); // Right-hand side
for (int i = r.MinIndex; i <= r.MaxIndex; i++)
{
r[i] = 1.0;
}
r[2] = -1.0;
/* r[1] = 4.0;
* r[2] = 10.0;
* r[3] = 8.0;*/
Console.WriteLine("LU stuff");
LUTridiagonalSolver mySolver = new LUTridiagonalSolver(a, b, c, r);
Vector <double> result = mySolver.solve();
Console.WriteLine("Solution");
result.extendedPrint();
// Array
int startIndex = -1;
Array <double> arr = new Array <double>(10, startIndex);
for (int j = arr.MinIndex; j <= arr.MaxIndex; j++)
{
arr[j] = (double)(j);
}
arr[arr.MinIndex] = 99.98;
// arr.extendedPrint();
// Matrix
Matrix <int> mat = new Matrix <int>(4, 4, 2, 1);
mat[mat.MinRowIndex, mat.MinColumnIndex] = 99;
mat.initCells(3);
mat[mat.MinRowIndex, mat.MinColumnIndex] = 98;
mat.extendedPrint();
for (int i = mat.MinRowIndex; i <= mat.MaxRowIndex; i++)
{
for (int j = mat.MinColumnIndex; j <= mat.MaxColumnIndex; j++)
{
mat[i, j] = i * j;
}
}
mat[mat.MinRowIndex, mat.MinColumnIndex] = 98;
mat.extendedPrint();
// Vectors
Vector <double> vec = new Vector <double>(10);
for (int j = vec.MinIndex; j <= vec.MaxIndex; j++)
{
vec[j] = (double)(vec.MaxIndex - j);
}
vec.print();
Vector <double> vec2 = vec + vec;
vec2.print();
vec2 = vec - vec;
vec2.print();
vec2 = vec - 3.0;
vec2.print();
vec2 = 2.0 + vec;
vec2.print();
// Numeric Matrices, initial tests
NumericMatrix <double> mat2 = new NumericMatrix <double>(4, 4);
mat2.initCells(1.0);
mat2.extendedPrint();
for (int i = mat2.MinRowIndex; i <= mat2.MaxRowIndex; i++)
{
for (int j = mat2.MinColumnIndex; j <= mat2.MaxColumnIndex; j++)
{
mat2[i, j] = i * j;
}
}
Console.WriteLine("Matrix multiplication...");
Vector <double> vec3 = new Vector <double>(4, 1, 2.0);
Vector <double> vec4 = mat2 * vec3;
vec4.print();
NumericMatrix <double> mat4 = mat2 * mat2;
mat4.extendedPrint();
// Numeric Matrices, testing accuracy
/* int rows = 10;
* int columns = 10;
* int startRow = 1;
* int startColumn = 1;
* NumericMatrix<double> A = new NumericMatrix<double>(rows, columns, startRow, startColumn);
* A[A.MinRowIndex, A.MinColumnIndex] = 1.0; A[A.MinRowIndex, A.MinColumnIndex + 1] = 2.0;
* A[A.MinRowIndex + 1, A.MinColumnIndex] = 3.0; A[A.MinRowIndex + 1, A.MinColumnIndex + 1] = 4.0;
* // A.extendedPrint();
*
* int si = 1; // Start index
* Vector<double> x = new Vector<double>(10, si);
* x[si] = 1.0;
* x[si + 1] = 2.0;
*
* Vector<double> y = A * x;
* // y.extendedPrint();
*
* NumericMatrix<double> B = A * A;
* // B.extendedPrint();
*
* B = B * B;
* B = B * B;
* // B.extendedPrint();
*
* // Modify rows and columns of matrices
* Vector<double> r1 = new Vector<double>(10, 1, 3.3);
* //r1.extendedPrint();
* // A.Row(A.MinRowIndex, r1);
* // A.Column(A.MaxColumnIndex, r1);
* A[A.MinRowIndex, A.MinColumnIndex] = 00.0001;
* A[A.MaxRowIndex, A.MaxColumnIndex] = -99.99;
* A[A.MaxRowIndex, A.MinColumnIndex] = 88.88;
* A.extendedPrint();
*
* // Slices
* Vector<double> vecSlice = A.getRow(A.MaxRowIndex);
* vecSlice.extendedPrint();
* vecSlice = A.getColumn(A.MinColumnIndex);
* vecSlice.extendedPrint();
*
* int[, ,] tensor = new int[3, 3, 3];
* for (int i = 0; i < tensor.GetLength(0); i++)
* for (int j = 0; j < tensor.GetLength(1); j++)
* for (int k = 0; k < tensor.GetLength(2); k++)
* tensor[i, j, k] = i * j * k;
*
* /* for (int i = 0; i < td.GetLength(0); i++)
* for (int j = 0; j < td.GetLength(0); j++)
* for (int k = 0; k < td.GetLength(0); k++)
* Console.Write(td[i, j, k]); Console.Write(", ");*/
//A.Column(2, r1);
// Tensors
int nrows = 2;
int ncols = 2;
int ndepth = 10;
Tensor <double> myTensor = new Tensor <double>(nrows, ncols, ndepth);
// myTensor[myTensor.MinThirdIndex] = B;
for (int j = myTensor.MinThirdIndex + 1; j <= myTensor.MaxThirdIndex; j++)
{
// myTensor[j] = A*A;
}
for (int j = myTensor.MinThirdIndex + 1; j <= myTensor.MaxThirdIndex; j++)
{
// myTensor[j].extendedPrint();
}
}