petsc-dev 2014-07-31
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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
Index of all Mat routines
Table of Contents for all manual pages
Index of all manual pages

Examples

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/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/ex7.c.html
src/ksp/ksp/examples/tutorials/ex8.c.html
src/ksp/ksp/examples/tutorials/ex8g.c.html