VecMax#

Determines the vector component with maximum real part and its location.

Synopsis#

#include "petscvec.h"   
PetscErrorCode VecMax(Vec x, PetscInt *p, PetscReal *val)

Collective

Input Parameter#

x - the vector

Output Parameters#

p - the index of val (pass NULL if you don’t want this) in the vector
val - the maximum component

Notes#

Returns the value PETSC_MIN_REAL and negative p if the vector is of length 0.

Returns the smallest index with the maximum value

Developer Note#

The Nag Fortran compiler does not like the symbol name VecMax

See Also#

Vectors and Parallel Data, Vec, VecNorm(), VecMin()

Level#

intermediate

Location#

src/vec/vec/interface/rvector.c

Examples#

src/ksp/ksp/tutorials/ex72.c
src/vec/vec/tutorials/ex1.c
src/dm/tutorials/ex15.c
src/ts/tutorials/ex9.c
src/ts/tutorials/ex17.c

Implementations#

VecMax_MPIKokkos() in src/vec/vec/impls/mpi/kokkos/mpikok.kokkos.cxx
VecMax_MPI() in src/vec/vec/impls/mpi/pvec2.c
VecMax_Nest() in src/vec/vec/impls/nest/vecnest.c
VecMax_Seq() in src/vec/vec/impls/seq/dvec2.c
VecMax_SeqKokkos() in src/vec/vec/impls/seq/kokkos/veckok.kokkos.cxx

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