petsc-3.9.4 2018-09-11
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VecStrideScatter

 Scatters a single component from a vector into a multi-component vector.

Synopsis

#include "petscvec.h" 
PetscErrorCode  VecStrideScatter(Vec s,PetscInt start,Vec v,InsertMode addv)
Collective on Vec

Input Parameter

s - the single-component vector
start - starting point of the subvector (defined by a stride)
addv - one of ADD_VALUES,INSERT_VALUES,MAX_VALUES

Output Parameter

v -the location where the subvector is scattered (the multi-component vector)

Notes

One must call VecSetBlockSize() on the multi-component vector before this routine to set the stride information, or use a vector created from a multicomponent DMDA.

The parallel layout of the vector and the subvector must be the same; i.e., nlocal of v = stride*(nlocal of s)

Not optimized; could be easily

See Also

VecStrideNorm(), VecStrideGather(), VecStrideMin(), VecStrideMax(), VecStrideGatherAll(),
VecStrideScatterAll(), VecStrideSubSetScatter(), VecStrideSubSetGather()

Level

advanced

Location

src/vec/vec/utils/vinv.c

Examples

src/vec/vec/examples/tutorials/ex12.c.html
src/vec/vec/examples/tutorials/ex16.c.html

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