petsc-3.14.6 2021-03-30
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PetscRandomGetValueReal

 Generates a purely real random number. Call this after first calling PetscRandomCreate().

Synopsis

#include "petscsys.h" 
PetscErrorCode  PetscRandomGetValueReal(PetscRandom r,PetscReal *val)
Not Collective

Intput Parameter

r - the random number generator context

Output Parameter

val - the value

Notes

Use VecSetRandom() to set the elements of a vector to random numbers.

Example of Usage

      PetscRandomCreate(PETSC_COMM_WORLD,&r);
      PetscRandomGetValueReal(r,&value1);
      PetscRandomGetValueReal(r,&value2);
      PetscRandomGetValueReal(r,&value3);
      PetscRandomDestroy(&r);

See Also

PetscRandomCreate(), PetscRandomDestroy(), VecSetRandom(), PetscRandomGetValue()

Level

intermediate

Location

src/sys/classes/random/interface/random.c

Examples

src/dm/tutorials/swarm_ex3.c.html
src/dm/field/tutorials/ex1.c.html
src/ksp/ksp/tutorials/ex21.c.html
src/ksp/ksp/tutorials/ex70.c.html
src/snes/tutorials/ex12.c.html

Implementations

PetscRandomGetValueReal_Rand in src/sys/classes/random/impls/rand/rand.c
PetscRandomGetValueReal_Rand48 in src/sys/classes/random/impls/rand48/rand48.c
PetscRandomGetValueReal_Rander48 in src/sys/classes/random/impls/rander48/rander48.c
PetscRandomGetValueReal_Random123 in src/sys/classes/random/impls/random123/random123.c
PetscRandomGetValueReal_Sprng in src/sys/classes/random/impls/sprng/sprng.c

Index of all Sys routines
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Index of all manual pages