VecMAXPY#
Computes y = y + sum alpha[i] x[i]
Synopsis#
#include "petscvec.h"
PetscErrorCode VecMAXPY(Vec y, PetscInt nv, const PetscScalar alpha[], Vec x[])
Logically Collective
Input Parameters#
nv - number of scalars and
xvectorsalpha - array of scalars
y - one vector
x - array of vectors
Notes#
y cannot be any of the x vectors
The implementation may use BLAS 2 operations when the vectors y have been obtained with VecDuplicateVecs()
See Also#
Vectors and Parallel Data, Vec, VecMAXPBY(),VecAYPX(), VecWAXPY(), VecAXPY(), VecAXPBYPCZ(), VecAXPBY(), VecDuplicateVecs()
Level#
intermediate
Location#
Examples#
src/vec/vec/tutorials/ex1.c
src/vec/vec/tutorials/ex1f90.F90
src/vec/vec/tutorials/ex20f90.F90
src/ts/tutorials/ex31.c
Implementations#
VecMAXPY_Nest() in src/vec/vec/impls/nest/vecnest.c
VecMAXPY_Seq() in src/vec/vec/impls/seq/dvec2.c
VecMAXPY_SeqKokkos() in src/vec/vec/impls/seq/kokkos/veckok.kokkos.cxx
VecMAXPY_SeqViennaCL() in src/vec/vec/impls/seq/seqviennacl/vecviennacl.cxx
Index of all Vec routines
Table of Contents for all manual pages
Index of all manual pages