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

Input Parameters#

  • da - the distributed array

  • 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 MPI rank 0)

  • scatter - the VecScatter that will map from the original vector to the ray

Note#

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

See Also#

DMDA - Creating vectors for structured grids, DM, DMDA, DMDirection, Vec, VecScatter

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