petsc-3.13.1 2020-05-02
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