petsc-3.14.5 2021-03-03
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# MatGetOption

Gets a parameter option that has been set for a matrix.

### Synopsis

    #include "petscmat.h"
    PetscErrorCode MatGetOption(Mat mat,MatOption op,PetscBool *flg)

Logically Collective on Mat for certain operations, such as MAT_SPD, not collective for MAT_ROW_ORIENTED, see MatOption

### Input Parameters

| mat | - the matrix
| option | - the option, this only responds to certain options, check the code for which ones

### Output Parameter

| flg | - turn the option on (PETSC_TRUE) or off (PETSC_FALSE)

### Notes

Can only be called after MatSetSizes() and MatSetType() have been set.

### See Also

MatOption, MatSetOption()

### Level

intermediate

### Location

src/mat/interface/matrix.c

### Examples

src/mat/tutorials/ex10.c.html
Index of all Mat routines
Table of Contents for all manual pages
Index of all manual pages