petsc-3.4.2 2013-07-02

# 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()

Level:advanced
Location: src/vec/vec/utils/vinv.c
Index of all Vec routines
Table of Contents for all manual pages
Index of all manual pages

### Examples

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