val -the value
Notes
Use VecSetRandom() to set the elements of a vector to random numbers.
When PETSc is compiled for complex numbers this returns a complex number with random real and complex parts.
Use PetscGetValueReal() to get a random real number.
To get a complex number with only a random real part, first call PetscRandomSetInterval() with a equal
low and high imaginary part. Similarly to get a complex number with only a random imaginary part call
PetscRandomSetInterval() with a equal low and high real part.
Example of Usage
PetscRandomCreate(PETSC_COMM_WORLD,&r);
PetscRandomGetValue(r,&value1);
PetscRandomGetValue(r,&value2);
PetscRandomGetValue(r,&value3);
PetscRandomDestroy(&r);
See Also
PetscRandomCreate(), PetscRandomDestroy(), VecSetRandom(), PetscRandomGetValueReal()
Level
intermediate
Location
src/sys/classes/random/interface/random.c
Examples
src/sys/classes/random/examples/tutorials/ex1.c.html
src/sys/classes/random/examples/tutorials/ex2.c.html
src/vec/vec/utils/tagger/examples/tutorials/ex1.c.html
src/dm/field/examples/tutorials/ex1.c.html
src/ksp/ksp/examples/tutorials/ex11.c.html
src/ksp/ksp/examples/tutorials/ex11f.F90.html
src/tao/unconstrained/examples/tutorials/spectraladjointassimilation.c.html
Implementations
PetscRandomGetValue_Rand in src/sys/classes/random/impls/rand/rand.c
PetscRandomGetValue_Rand48 in src/sys/classes/random/impls/rand48/rand48.c
PetscRandomGetValue_Rander48 in src/sys/classes/random/impls/rander48/rander48.c
PetscRandomGetValue_Random123 in src/sys/classes/random/impls/random123/random123.c
PetscRandomGetValue_Sprng in src/sys/classes/random/impls/sprng/sprng.c
Index of all Sys routines
Table of Contents for all manual pages
Index of all manual pages