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 DMDA

• 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

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Index of all DMDA routines
Table of Contents for all manual pages
Index of all manual pages