petsc-3.7.1 2016-05-15
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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 iname[],const char value[])
Not collective, but setting values on certain processors could cause problems Many brfor parallel objects looking for options. Many br

Input Parameters

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

Many br

Note

This function can be called BEFORE PetscInitialize() Many br

Only some options have values associated with them, such as Many br-ksp_rtol tol. Other options stand alone, such as -ksp_monitor. Many br

Developers Note: Uses malloc() directly because PETSc may not yet have been fully initialized Many br

See Also

PetscOptionsInsert()

Level:intermediate
Location:
src/sys/objects/options.c
Index of all Sys routines
Table of Contents for all manual pages
Index of all manual pages

Examples

src/sys/examples/tutorials/ex16.c.html
src/vec/vec/examples/tutorials/ex5.c.html
src/vec/vec/examples/tutorials/ex10.c.html
src/ksp/pc/examples/tutorials/ex2.c.html
src/ksp/ksp/examples/tutorials/ex63.cxx.html
src/snes/examples/tutorials/ex30.c.html
src/snes/examples/tutorials/ex74f.F90.html
src/tao/unconstrained/examples/tutorials/eptorsion1.c.html
src/tao/constrained/examples/tutorials/toyf.F.html