petsc-3.7.3 2016-07-24
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# MatCreateVecs

Get vector(s) compatible with the matrix, i.e. with the same parallel layout

### Synopsis

    #include "petscmat.h"
    PetscErrorCode MatCreateVecs(Mat mat,Vec *right,Vec *left)

Collective on Mat

### Input Parameter

mat -the matrix

### Output Parameter

| right | - (optional) vector that the matrix can be multiplied against
| left | - (optional) vector that the matrix vector product can be stored in

### Notes

The blocksize of the returned vectors is determined by the row and column block sizes set with MatSetBlockSizes() or the single blocksize (same for both) set by MatSetBlockSize().

Notes: These are new vectors which are not owned by the Mat, they should be destroyed in VecDestroy() when no longer needed

### See Also

MatCreate(), VecDestroy()

Level:advanced
Location: src/mat/interface/matrix.c
Index of all Mat routines
Table of Contents for all manual pages
Index of all manual pages

### Examples

src/mat/examples/tutorials/ex9.c.html
src/ksp/ksp/examples/tutorials/ex4.c.html
src/ksp/ksp/examples/tutorials/ex10.c.html
src/ksp/ksp/examples/tutorials/ex42.c.html
src/ksp/ksp/examples/tutorials/ex49.c.html
src/ksp/ksp/examples/tutorials/ex63.cxx.html
src/ksp/ksp/examples/tutorials/ex64.c.html
src/ksp/ksp/examples/tutorials/ex15f.F.html
src/ksp/ksp/examples/tutorials/ex54f.F.html
src/ts/examples/tutorials/ex8.c.html
src/ts/examples/tutorials/ex16.c.html