VecAYPX#

Computes y = x + beta y.

Synopsis#

#include "petscvec.h"   
PetscErrorCode VecAYPX(Vec y, PetscScalar beta, Vec x)

Logically Collective

Input Parameters#

beta - the scalar
x - the unscaled vector
y - the vector to be scaled

Output Parameter#

y - output vector

Developer Note#

The implementation is optimized for beta of -1.0, 0.0, and 1.0

See Also#

Vectors and Parallel Data, Vec, VecMAXPY(), VecWAXPY(), VecAXPY(), VecAXPBYPCZ(), VecAXPBY()

Level#

intermediate

Location#

src/vec/vec/interface/rvector.c

Examples#

src/ksp/ksp/tutorials/ex100.c
src/ksp/ksp/tutorials/ex100f.F90
src/ksp/ksp/tutorials/ex14f.F90
src/ksp/ksp/tutorials/ex74.c
src/tao/pde_constrained/tutorials/elliptic.c
src/tao/pde_constrained/tutorials/hyperbolic.c
src/tao/pde_constrained/tutorials/parabolic.c
src/ts/tutorials/ex3.c
src/ts/tutorials/ex31.c
src/ts/tutorials/ex51.c
src/ts/tutorials/ex74.c

Implementations#

VecAYPX_Nest in src/vec/vec/impls/nest/vecnest.c
VecAYPX_Seq in src/vec/vec/impls/seq/dvec2.c
VecAYPX_SeqKokkos in src/vec/vec/impls/seq/kokkos/veckok.kokkos.cxx
VecAYPX_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