PETSc version 3.17.0
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# VecStrideMaxAll

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

### Synopsis

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

Collective on Vec

### Input Parameter

| v | - the vector

### Output Parameters

| index | - the location where the maximum occurred (not supported, pass NULL, if you need this, send mail to petsc-maint@mcs.anl.gov to request it)
| nrm | - the maximum values of each subvector

### Notes

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

### See Also

VecMax(), VecStrideNorm(), VecStrideGather(), VecStrideScatter(), VecStrideMin()

### Level

advanced

### Location

src/vec/vec/utils/vinv.c
Index of all Vec routines
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