petsc-3.7.1 2016-05-15

DMDAGetRay

Returns a vector on process zero that contains a row or column of the values in a DMDA vector

#include "petscdmda.h"   
PetscErrorCode  DMDAGetRay(DM da,DMDADirection dir,PetscInt gp,Vec *newvec,VecScatter *scatter)

Collective on DMDA Many br

	da	- the distributed array Many br
	vec	- the vector Many br
	dir	- Cartesian direction, either DMDA_X, DMDA_Y, or DMDA_Z Many br
	gp	- global grid point number in this direction Many br

	newvec	- the new vector that can hold the values (size zero on all processes except process 0) Many br
	scatter	- the VecScatter that will map from the original vector to the slice Many br

Many br

All processors that share the DMDA must call this with the same gp value Many br

distributed array, get, processor subset