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 Notes#

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/tao/pde_constrained/tutorials/elliptic.c
src/tao/pde_constrained/tutorials/hyperbolic.c
src/vec/vec/tutorials/ex20f90.F90
src/ts/tutorials/ex9.c
src/vec/vec/tutorials/ex1f.F90
src/vec/vec/tutorials/ex1.c
src/ts/tutorials/ex3.c
src/vec/vec/tutorials/ex1f90.F90
src/ts/tutorials/ex8.c
src/tao/pde_constrained/tutorials/parabolic.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


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Index of all manual pages