TaoGetObjectiveAndGradient

Gets the combined objective function and gradient evaluation routine for the function to be optimized

Synopsis

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

• tao - the optimizer

• x - input vector

• f - objective value (output)

• g - gradient value (output)

• ctx - [optional] user-defined function context

See Also

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

Level

beginner

Location

src/tao/interface/taosolver_fg.c

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