petsc-master 2014-09-22
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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