TaoComputeGradient#

Computes the gradient of the objective function

Synopsis#

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

Collective

Input Parameters#

  • tao - the Tao context

  • X - input vector

Output Parameter#

  • G - gradient vector

Options Database Keys#

  • -tao_test_gradient - compare the user provided gradient with one compute via finite differences to check for errors

  • -tao_test_gradient_view - display the user provided gradient, the finite difference gradient and the difference between them to help users detect the location of errors in the user provided gradient

Note#

TaoComputeGradient() is typically used within the implementation of the optimization method, so most users would not generally call this routine themselves.

See Also#

TAO: Optimization Solvers, TaoComputeObjective(), TaoComputeObjectiveAndGradient(), TaoSetGradient()

Level#

developer

Location#

src/tao/interface/taosolver_fg.c

Examples#

src/tao/tutorials/ex4.c

Index of all Tao routines
Table of Contents for all manual pages
Index of all manual pages