GRASS Programmer's Manual
6.4.3(2013)-r
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#include <math.h>
#include <unistd.h>
#include <stdio.h>
#include <string.h>
#include "grass/N_pde.h"
#include "solvers_local_proto.h"
Go to the source code of this file.
Functions | |
int | N_solver_gauss (N_les *les) |
The gauss elimination solver for quardatic matrices. More... | |
int | N_solver_lu (N_les *les) |
The LU solver for quardatic matrices. More... | |
int | N_solver_cholesky (N_les *les) |
The choleksy decomposition solver for quardatic, symmetric positiv definite matrices. More... | |
void | thomalg (double **M, double *V, int rows) |
double * | vectmem (int rows) |
Allocate vector memory. More... | |
int N_solver_cholesky | ( | N_les * | les) |
The choleksy decomposition solver for quardatic, symmetric positiv definite matrices.
This solver does not support sparse matrices The matrix A will be overwritten. The result is written to the vector x in the N_les structure
les | N_les * |
Definition at line 152 of file N_solvers.c.
References N_les::A, N_les::b, check_symmetry(), G_message(), G_warning(), N_NORMAL_LES, N_les::quad, N_les::rows, N_les::type, and N_les::x.
int N_solver_gauss | ( | N_les * | les) |
The gauss elimination solver for quardatic matrices.
This solver does not support sparse matrices The matrix A will be overwritten. The result is written to the vector x in the N_les structure
les | N_les * |
Definition at line 46 of file N_solvers.c.
References N_les::A, N_les::b, G_fatal_error(), G_message(), G_warning(), N_les_pivot_create(), N_NORMAL_LES, N_les::quad, N_les::rows, N_les::type, and N_les::x.
int N_solver_lu | ( | N_les * | les) |
The LU solver for quardatic matrices.
This solver does not support sparse matrices The matrix A will be overwritten. The result is written to the vector x in the N_les structure
les | N_les * |
Definition at line 82 of file N_solvers.c.
References N_les::A, N_les::b, G_free(), G_message(), G_warning(), N_les_pivot_create(), N_NORMAL_LES, N_les::quad, N_les::rows, N_les::type, vectmem(), and N_les::x.
void thomalg | ( | double ** | M, |
double * | V, | ||
int | rows | ||
) |
double* vectmem | ( | int | rows) |
Allocate vector memory.
rows | int |
Definition at line 423 of file N_solvers.c.
Referenced by N_solver_bicgstab(), N_solver_cg(), N_solver_lu(), N_solver_pcg(), and thomalg().