PetscRandomGetValueReal

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

Synopsis

#include "petscsys.h" 
PetscErrorCode PetscRandomGetValueReal(PetscRandom r, PetscReal *val)

Not Collective

Input Parameter

• r - the random number generator context

Output Parameter

• val - the value

Note

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

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

Level

intermediate

Location

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

Examples

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

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

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