petsc-3.6.2 2015-10-02
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# TaoLineSearchComputeObjectiveAndGradient

Computes the objective function value at a given point

### Synopsis

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

Collective on Tao

### Input Parameters

| ls | - the TaoLineSearch context
| x | - input vector

### Output Parameter

| 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.

### 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