petsc-master 2018-05-22
Report Typos and Errors

MatSetFromOptions

Creates a matrix where the type is determined from the options database. Generates a parallel MPI matrix if the communicator has more than one processor. The default matrix type is AIJ, using the routines MatCreateSeqAIJ() and MatCreateAIJ() if you do not select a type in the options database.

Synopsis

#include "petscmat.h"  
PetscErrorCode  MatSetFromOptions(Mat B)
Collective on Mat

Input Parameter

A -the matrix

Options Database Keys

-mat_type seqaij - AIJ type, uses MatCreateSeqAIJ()
-mat_type mpiaij - AIJ type, uses MatCreateAIJ()
-mat_type seqdense - dense type, uses MatCreateSeqDense()
-mat_type mpidense - dense type, uses MatCreateDense()
-mat_type seqbaij - block AIJ type, uses MatCreateSeqBAIJ()
-mat_type mpibaij - block AIJ type, uses MatCreateBAIJ()

Even More Options Database Keys

See the manpages for particular formats (e.g., MatCreateSeqAIJ()) for additional format-specific options.

Keywords

matrix, create

See Also

MatCreateSeqAIJ((), MatCreateAIJ(),
MatCreateSeqDense(), MatCreateDense(), MatCreateSeqBAIJ(), MatCreateBAIJ(), MatCreateSeqSBAIJ(), MatCreateSBAIJ(), MatConvert()

Level

beginner

Location

src/mat/utils/gcreate.c

Examples

src/mat/examples/tutorials/ex4.c.html
src/mat/examples/tutorials/ex10.c.html
src/mat/examples/tutorials/ex15.c.html
src/mat/examples/tutorials/ex16.c.html
src/mat/examples/tutorials/ex17.c.html
src/ksp/pc/examples/tutorials/ex3.c.html
src/ksp/ksp/examples/tutorials/ex1.c.html
src/ksp/ksp/examples/tutorials/ex2.c.html
src/ksp/ksp/examples/tutorials/ex3.c.html
src/ksp/ksp/examples/tutorials/ex5.c.html
src/ksp/ksp/examples/tutorials/ex6.c.html

Implementations

MatSetFromOptions_MPIAIJ in src/mat/impls/aij/mpi/mpiaij.c
MatSetFromOptions_MPIAIJCUSPARSE in src/mat/impls/aij/mpi/mpicusparse/mpiaijcusparse.cu
MatSetFromOptions_SeqAIJCUSPARSE in src/mat/impls/aij/seq/seqcusparse/aijcusparse.cu
MatSetFromOptions_IS in src/mat/impls/is/matis.c
MatSetFromOptions_MFFD in src/mat/impls/mffd/mffd.c
MatSetFromOptions_MPISELL in src/mat/impls/sell/mpi/mpisell.c

Index of all Mat routines
Table of Contents for all manual pages
Index of all manual pages