petsc-3.7.1 2016-05-15

TaoSetOptionsPrefix

Sets the prefix used for searching for all TAO options in the database.

Synopsis

#include "petsctao.h" 
PetscErrorCode TaoSetOptionsPrefix(Tao tao, const char p[])

Logically Collective on Tao Many br

Input Parameters

	tao	- the Tao context Many br
	prefix	- the prefix string to prepend to all TAO option requests Many br

Notes

A hyphen (-) must NOT be given at the beginning of the prefix name. Many brThe first character of all runtime options is AUTOMATICALLY the hyphen. Many br

For example, to distinguish between the runtime options for two Many brdifferent TAO solvers, one could call Many br

      TaoSetOptionsPrefix(tao1,"sys1_")
      TaoSetOptionsPrefix(tao2,"sys2_")

Many br

This would enable use of different options for each system, such as Many br

      -sys1_tao_method blmvm -sys1_tao_gtol 1.e-3
      -sys2_tao_method lmvm  -sys2_tao_gtol 1.e-4

Many br

TaoSetOptionsPrefix

Synopsis

Input Parameters

Notes

See Also