petsc-3.12.5 2020-03-29

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.

Level

beginner

MatSetFromOptions

Synopsis

Input Parameter

Options Database Keys

Even More Options Database Keys

See Also

Level

Location

Examples

Implementations