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

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Index of all Vec routines
Table of Contents for all manual pages
Index of all manual pages