petsc-master 2014-12-24
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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 on Tao

Input Parameters

ls - the TaoLineSearch context
x - input vector

Output Parameter

f - Objective value at X
gts - inner product of gradient and step direction at X

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

See Also

TaoLineSearchComputeGradient(), TaoLineSearchComputeObjectiveAndGradient(), TaoLineSearchSetObjectiveRoutine()

Level:developer
Location:
src/tao/linesearch/interface/taolinesearch.c
Index of all TaoLineSearch routines
Table of Contents for all manual pages
Index of all manual pages