VecSetRandom#

Sets all components of a vector to random numbers.

Synopsis#

#include "petscvec.h"   
PetscErrorCode VecSetRandom(Vec x, PetscRandom rctx)

Logically Collective

Input Parameters#

x - the vector
rctx - the random number context, formed by PetscRandomCreate(), or use NULL and it will create one internally.

Output Parameter#

x - the vector

Example of Usage#

     PetscRandomCreate(PETSC_COMM_WORLD,&rctx);
     VecSetRandom(x,rctx);
     PetscRandomDestroy(&rctx);

See Also#

Vectors and Parallel Data, Vec, VecSet(), VecSetValues(), PetscRandomCreate(), PetscRandomDestroy()

Level#

intermediate

Location#

src/vec/vec/interface/vector.c

Examples#

src/snes/tutorials/ex11.c
src/ksp/pc/tutorials/ex4.c
src/ksp/ksp/tutorials/ex52.c
src/ksp/ksp/tutorials/ex5.c
src/tao/tutorials/ex4.c
src/ksp/pc/tutorials/ex3.c
src/snes/tutorials/ex7.c
src/tao/bound/tutorials/plate2.c
src/tao/unconstrained/tutorials/minsurf2.c
src/tao/bound/tutorials/plate2f.F90

Implementations#

VecSetRandom_Nest() in src/vec/vec/impls/nest/vecnest.c
VecSetRandom_Seq() in src/vec/vec/impls/seq/bvec2.c
VecSetRandom_SeqKokkos() in src/vec/vec/impls/seq/kokkos/veckok.kokkos.cxx
VecSetRandom_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