petsc-3.13.6 2020-09-29

VecStrideMaxAll

Computes the maximums of subvectors of a vector defined by a starting point and a stride and optionally its location.

#include "petscvec.h" 
PetscErrorCode  VecStrideMaxAll(Vec v,PetscInt idex[],PetscReal nrm[])

Collective on Vec

v -the vector

	index	- the location where the maximum occurred (not supported, pass NULL, if you need this, send mail to [email protected] to request it)
	nrm	- the maximum values of each subvector

One must call VecSetBlockSize() before this routine to set the stride information, or use a vector created from a multicomponent DMDA.

The dimension of nrm must be the same as the vector block size

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