petsc-3.14.6 2021-03-30
VecStrideScale
Scales a subvector of a vector defined by a starting point and a stride.
Synopsis
#include "petscvec.h"
PetscErrorCode VecStrideScale(Vec v,PetscInt start,PetscScalar scale)
Logically Collective on Vec
Input Parameter
| v | - the vector
|
| start | - starting point of the subvector (defined by a stride)
|
| scale | - value to multiply each subvector entry by
|
Notes
One must call VecSetBlockSize() before this routine to set the stride
information, or use a vector created from a multicomponent DMDA.
This will only work if the desire subvector is a stride subvector
See Also
VecNorm(), VecStrideGather(), VecStrideScatter(), VecStrideMin(), VecStrideMax(), VecStrideScale()
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