TaoSetUpdate#

Sets the general-purpose update function called at the beginning of every iteration of the optimization algorithm. Called after the new solution and the gradient is determined, but before the Hessian is computed (if applicable).

Synopsis#

#include "petsctao.h" 
PetscErrorCode TaoSetUpdate(Tao tao, PetscErrorCode (*func)(Tao tao, PetscInt it, void *ctx), void *ctx)

Logically Collective

Input Parameters#

tao - The Tao solver
func - The function
ctx - The update function context

Calling sequence of `func`#

tao - The optimizer context
it - The current iteration index
ctx - The update context

Notes#

Users can modify the gradient direction or any other vector associated to the specific solver used. The objective function value is always recomputed after a call to the update hook.

Level#

advanced

Location#

src/tao/interface/taosolver.c

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