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 MatCreateMPIAIJ() if you do not select a type in the options database.

Synopsis

#include "petscmat.h"  
int 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 MatCreateMPIAIJ()
-mat_type seqbdiag - block diagonal type, uses MatCreateSeqBDiag()
-mat_type mpibdiag - block diagonal type, uses MatCreateMPIBDiag()
-mat_type mpirowbs - rowbs type, uses MatCreateMPIRowbs()
-mat_type seqdense - dense type, uses MatCreateSeqDense()
-mat_type mpidense - dense type, uses MatCreateMPIDense()
-mat_type seqbaij - block AIJ type, uses MatCreateSeqBAIJ()
-mat_type mpibaij - block AIJ type, uses MatCreateMPIBAIJ()

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((), MatCreateMPIAIJ(),
MatCreateSeqBDiag(),MatCreateMPIBDiag(), MatCreateSeqDense(), MatCreateMPIDense(), MatCreateMPIRowbs(), MatCreateSeqBAIJ(), MatCreateMPIBAIJ(), MatCreateSeqSBAIJ(), MatCreateMPISBAIJ(), 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/sles/examples/tutorials/ex1.c.html
src/sles/examples/tutorials/ex2.c.html
src/sles/examples/tutorials/ex3.c.html
src/sles/examples/tutorials/ex4.c.html
src/sles/examples/tutorials/ex5.c.html
src/sles/examples/tutorials/ex7.c.html
src/sles/examples/tutorials/ex8.c.html
src/sles/examples/tutorials/ex9.c.html
src/sles/examples/tutorials/ex11.c.html
src/sles/examples/tutorials/ex12.c.html
src/sles/examples/tutorials/ex15.c.html