petsc-3.11.1 2019-04-17
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PetscOptionsSetValue

Sets an option name-value pair in the options database, overriding whatever is already present.

Synopsis

#include "petscsys.h"   
PetscErrorCode PetscOptionsSetValue(PetscOptions options,const char name[],const char value[])
Not Collective, but setting values on certain processors could cause problems for parallel objects looking for options.

Input Parameters

options - options database, use NULL for the default global database
name - name of option, this SHOULD have the - prepended
value - the option value (not used for all options, so can be NULL)

Note

This function can be called BEFORE PetscInitialize()

Developers Note: Uses malloc() directly because PETSc may not be initialized yet.

See Also

PetscOptionsInsert(), PetscOptionsClearValue()

Level

intermediate

Location

src/sys/objects/options.c

Examples

src/sys/examples/tutorials/ex16.c.html
src/sys/examples/tutorials/ex16f.F90.html
src/vec/vec/examples/tutorials/ex5.c.html
src/vec/vec/examples/tutorials/ex10.c.html
src/vec/vec/examples/tutorials/ex5f.F90.html
src/dm/impls/stag/examples/tutorials/ex4.c.html
src/ksp/ksp/examples/tutorials/ex63.cxx.html
src/snes/examples/tutorials/ex30.c.html
src/tao/unconstrained/examples/tutorials/eptorsion1.c.html
src/tao/unconstrained/examples/tutorials/rosenbrock1.c.html

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