VecStrideGatherAll

Gathers all the single components from a multi-component vector into separate vectors.

Synopsis

#include "petscvec.h" 
PetscErrorCode VecStrideGatherAll(Vec v, Vec s[], InsertMode addv)

Collective

Input Parameters

• v - the vector

• addv - one of ADD_VALUES, INSERT_VALUES, MAX_VALUES

Output Parameter

• s - the location where the subvectors are stored

Notes

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

If x is the array representing the vector x then this gathers the arrays (x[start],x[start+stride],x[start+2*stride], ….) for start=0,1,2,…bs-1

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

Vec, VecStrideNorm(), VecStrideScatter(), VecStrideMin(), VecStrideMax(), VecStrideGather(), VecStrideScatterAll()

Level

advanced

Location

src/vec/vec/utils/vinv.c

Examples

src/vec/vec/tutorials/ex16f.F90
src/vec/vec/tutorials/ex16.c
src/snes/tutorials/ex7.c

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Index of all Vec routines
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Index of all manual pages