PETSc version 3.17.5
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TaoGetObjectiveAndGradient

Gets a combined objective function and gradient evaluation routine for minimization

Synopsis

#include "petsctao.h" 
PetscErrorCode TaoGetObjectiveAndGradient(Tao tao, Vec *g, PetscErrorCode (**func)(Tao, Vec, PetscReal*, Vec, void*), void **ctx)
Not collective

Input Parameter

tao - the Tao context

Output Parameters

g - the vector to internally hold the gradient computation
func - the gradient function
ctx - user-defined context for private data for the gradient evaluation routine

Calling sequence of func

     func (Tao tao, Vec x, PetscReal *f, Vec g, void *ctx);

x - input vector
f - objective value (output)
g - gradient value (output)
ctx - [optional] user-defined function context

See Also

TaoSetObjective(), TaoSetGradient(), TaoSetHessian(), TaoSetObjectiveAndGradient()

Level

beginner

Location

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