PETSc version 3.16.3
MatCreateDense
Creates a matrix in dense format.
Synopsis
#include "petscmat.h"
PetscErrorCode MatCreateDense(MPI_Comm comm,PetscInt m,PetscInt n,PetscInt M,PetscInt N,PetscScalar *data,Mat *A)
Collective
Input Parameters
| 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.
|
Output Parameter
Notes
The dense format is fully compatible with standard Fortran 77
storage by columns.
Note that, although local portions of the matrix are stored in column-major
order, the matrix is partitioned across MPI ranks by row.
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).
See Also
MatCreate(), MatCreateSeqDense(), MatSetValues()
Level
intermediate
Location
src/mat/impls/dense/mpi/mpidense.c
Examples
src/ksp/ksp/tutorials/ex21.c.html
src/ksp/ksp/tutorials/ex76.c.html
src/ksp/ksp/tutorials/ex77.c.html
src/ksp/ksp/tutorials/ex79.c.html
src/ksp/ksp/tutorials/ex81.c.html
src/ksp/ksp/tutorials/ex82.c.html
src/ksp/ksp/tutorials/ex76f.F90.html
src/ksp/ksp/tutorials/ex77f.F90.html
src/ts/tutorials/ex23fwdadj.c.html
src/ts/tutorials/ex16fwd.c.html
src/tao/pde_constrained/tutorials/elliptic.c.html
Index of all Mat routines
Table of Contents for all manual pages
Index of all manual pages