petsc-master 2014-09-16
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TaoSetGradientRoutine

Sets the gradient evaluation routine for minimization

Synopsis

#include "petsctao.h" 
PetscErrorCode TaoSetGradientRoutine(Tao tao,  PetscErrorCode (*func)(Tao, Vec, Vec, void*),void *ctx)
Logically collective on Tao

Input Parameter

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

Calling sequence of func

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

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

See Also

TaoSetObjectiveRoutine(), TaoSetHessianRoutine() TaoSetObjectiveAndGradientRoutine()

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

Examples

src/tao/pde_constrained/examples/tutorials/elliptic.c.html
src/tao/pde_constrained/examples/tutorials/parabolic.c.html
src/tao/pde_constrained/examples/tutorials/hyperbolic.c.html