petsc-3.8.4 2018-03-24

TaoLineSearchSetObjectiveAndGradientRoutine

Sets the objective/gradient evaluation routine for the line search

Synopsis

#include "petsctaolinesearch.h" 
PetscErrorCode TaoLineSearchSetObjectiveAndGradientRoutine(TaoLineSearch ls, PetscErrorCode(*func)(TaoLineSearch ls, Vec x, PetscReal *, Vec g, void*), void *ctx)

Logically Collective on TaoLineSearch

Input Parameter

	ls	- the TaoLineSearch context
	func	- the objective and gradient evaluation routine
	ctx	- the (optional) user-defined context for private data

Calling sequence of func

     func (TaoLinesearch ls, Vec x, PetscReal *f, Vec g, void *ctx);

	x	- input vector
	f	- function value
	g	- gradient vector
	ctx (optional) user	- defined context

Note

Use this routine only if you want the line search objective and gradient evaluation routines to be different from the Tao's objective and gradient evaluation routines.

Note

Some algorithms (lcl, gpcg) set their own objective routine for the line search, application programmers should be wary of overriding the default objective routine.

TaoLineSearchSetObjectiveAndGradientRoutine

Synopsis

Input Parameter

Calling sequence of func

Note

Note

See Also