TaoSetGradient

Sets the gradient evaluation routine for the function to be optimized

Synopsis

#include "petsctao.h" 
PetscErrorCode TaoSetGradient(Tao tao, Vec g, PetscErrorCode (*func)(Tao tao, Vec x, Vec g, void *ctx), void *ctx)

Logically Collective

Input Parameters

• tao - the Tao context

• g - [optional] the vector to internally hold the gradient computation

• func - the gradient function

• ctx - [optional] user-defined context for private data for the gradient evaluation routine (may be NULL)

Calling sequence of func

• tao - the optimization solver

• x - input vector

• g - gradient value (output)

• ctx - [optional] user-defined function context

See Also

TAO: Optimization Solvers, Tao, TaoSolve(), TaoSetObjective(), TaoSetHessian(), TaoSetObjectiveAndGradient(), TaoGetGradient()

Level

beginner

Location

src/tao/interface/taosolver_fg.c

Examples

src/tao/tutorials/ex4.c
src/tao/pde_constrained/tutorials/parabolic.c
src/tao/pde_constrained/tutorials/hyperbolic.c
src/tao/pde_constrained/tutorials/elliptic.c

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