petsc-3.8.4 2018-03-24

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

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