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#
Examples#
src/vec/vec/tutorials/ex16.c
src/snes/tutorials/ex7.c
Index of all Vec routines
Table of Contents for all manual pages
Index of all manual pages