petsc-3.7.7 2017-09-25

TaoLineSearchComputeObjectiveAndGradient

Computes the objective function value at a given point

#include "petsctaolinesearch.h" 
PetscErrorCode TaoLineSearchComputeObjectiveAndGradient(TaoLineSearch ls, Vec x, PetscReal *f, Vec g)

Collective on Tao

	ls	- the TaoLineSearch context
	x	- input vector

	f	- Objective value at X
	g	- Gradient vector at X

Notes: TaoLineSearchComputeObjectiveAndGradient() is typically used within line searches so most users would not generally call this routine themselves.