PETSc version 3.15.5
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,DMDirection dir,PetscInt gp,Vec *newvec,VecScatter *scatter)
Collective on DMDA
Input Parameters
|  | da | - the distributed array | 
|  | vec | - the vector | 
|  | dir | - Cartesian direction, either DM_X, DM_Y, or DM_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
Level
advanced
Location
src/dm/impls/da/dasub.c
Index of all DMDA routines
Table of Contents for all manual pages
Index of all manual pages