petsc-3.8.4 2018-03-24

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

Examples