# TaoAppComputeObjectiveAndGradient

Compute the gradient of the objective function using the routine set by TaoApplicationSetGradientRoutine().

## Synopsis

    #include "tao.h"
    int TaoAppComputeObjectiveAndGradient(TAO_APPLICATION taoapp, Vec X, double *f, Vec G)

Collective on TAO_APPLICATION

## Input Parameters

| taopp | - the TAO_APPLICATION context
| X | - the point where the objective should be evaluated

## Output Parameter

| f | - function value
| G | - the gradient vector.

## Keywords

TAO_APPLICATION, objective

## See Also

TaoAppComputeGradient(), TaoAppSetObjectiveAndGradientRoutine()

Level:developer
Location:src/petsctao/application/petscapp/tao_app_fg.c
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