TaoLineSearchComputeObjectiveAndGTS

Computes the objective function value and inner product of gradient and step direction at a given point

Synopsis

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

Collective

Input Parameters

• ls - the TaoLineSearch context

• x - input vector

Output Parameters

• f - Objective value at x

• gts - inner product of gradient and step direction at x

Note

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

See Also

TAO: Optimization Solvers, Tao, TaoLineSearch, TaoLineSearchComputeGradient(), TaoLineSearchComputeObjectiveAndGradient(), TaoLineSearchSetObjectiveRoutine()

Level

developer

Location

src/tao/linesearch/interface/taolinesearch.c

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Index of all TaoLineSearch routines
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