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

Input Parameters#

  • 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#

Vec, VecNorm(), VecStrideGather(), VecStrideScatter(), VecStrideMin(), VecStrideMax()

Level#

advanced

Location#

src/vec/vec/utils/vinv.c

Examples#

src/vec/vec/tutorials/ex13.c

Index of all Vec routines
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Index of all manual pages