petsc-3.5.2 2014-09-08
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DMDAGetRay

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

Synopsis

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

Input Parameters

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

Output Parameters

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

Notes

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

Keywords

distributed array, get, processor subset

Level:advanced
Location:
src/dm/impls/da/dasub.c
Index of all DM routines
Table of Contents for all manual pages
Index of all manual pages