#include "petscmat.h" PetscErrorCode MatCreateDense(MPI_Comm comm,PetscInt m,PetscInt n,PetscInt M,PetscInt N,PetscScalar *data,Mat *A)Collective on MPI_Comm
comm | - MPI communicator | |
m | - number of local rows (or PETSC_DECIDE to have calculated if M is given) | |
n | - number of local columns (or PETSC_DECIDE to have calculated if N is given) | |
M | - number of global rows (or PETSC_DECIDE to have calculated if m is given) | |
N | - number of global columns (or PETSC_DECIDE to have calculated if n is given) | |
data | - optional location of matrix data. Set data=NULL (PETSC_NULL_SCALAR for Fortran users) for PETSc to control all matrix memory allocation. |
The data input variable is intended primarily for Fortran programmers who wish to allocate their own matrix memory space. Most users should set data=NULL (PETSC_NULL_SCALAR for Fortran users).
The user MUST specify either the local or global matrix dimensions (possibly both).