VecWAXPY#
Computes w = alpha x + y.
Synopsis#
#include "petscvec.h"
PetscErrorCode VecWAXPY(Vec w, PetscScalar alpha, Vec x, Vec y)
Logically Collective
Input Parameters#
alpha - the scalar
x - first vector, multiplied by
alphay - second vector
Output Parameter#
w - the result
Note#
w cannot be either x or y, but x and y can be the same
Developer Notes#
The implementation is optimized for alpha of -1.0, 0.0, and 1.0
See Also#
Vectors and Parallel Data, Vec, VecAXPY(), VecAYPX(), VecAXPBY(), VecMAXPY(), VecAXPBYPCZ()
Level#
intermediate
Location#
Examples#
src/tao/pde_constrained/tutorials/parabolic.c
src/tao/pde_constrained/tutorials/hyperbolic.c
src/vec/vec/tutorials/ex20f90.F90
src/vec/vec/tutorials/ex1f.F90
src/ts/tutorials/ex10.c
src/vec/vec/tutorials/ex1.c
src/tao/pde_constrained/tutorials/elliptic.c
src/vec/vec/tutorials/ex1f90.F90
src/tao/tutorials/ex4.c
src/tao/unconstrained/tutorials/spectraladjointassimilation.c
Implementations#
VecWAXPY_Nest() in src/vec/vec/impls/nest/vecnest.c
VecWAXPY_Seq() in src/vec/vec/impls/seq/dvec2.c
VecWAXPY_SeqKokkos() in src/vec/vec/impls/seq/kokkos/veckok.kokkos.cxx
VecWAXPY_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