petsc-3.7.3 2016-07-24
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# TaoComputeGradient

Computes the gradient of the objective function

### Synopsis

    #include "petsctao.h"
    PetscErrorCode TaoComputeGradient(Tao tao, Vec X, Vec G)

Collective on Tao

### Input Parameters

| tao | - the Tao context
| X | - input vector

### Output Parameter

G -gradient vector

Notes: TaoComputeGradient() is typically used within minimization implementations, so most users would not generally call this routine themselves.

### See Also

TaoComputeObjective(), TaoComputeObjectiveAndGradient(), TaoSetGradientRoutine()

Level:advanced
Location: src/tao/interface/taosolver_fg.c
Index of all Tao routines
Table of Contents for all manual pages
Index of all manual pages