petsc-master 2017-01-20
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Monitor the solver and the current solution. This routine will record the iteration number and residual statistics, call any monitors specified by the user, and calls the convergence-check routine.


#include "petsctao.h" 
PetscErrorCode TaoMonitor(Tao tao, PetscInt its, PetscReal f, PetscReal res, PetscReal cnorm, PetscReal steplength, TaoConvergedReason *reason)

Input Parameters

tao - the Tao context
its - the current iterate number (>=0)
f - the current objective function value
res - the gradient norm, square root of the duality gap, or other measure indicating distince from optimality. This measure will be recorded and used for some termination tests.
cnorm - the infeasibility of the current solution with regard to the constraints.
steplength - multiple of the step direction added to the previous iterate.

Output Parameters

reason -The termination reason, which can equal TAO_CONTINUE_ITERATING

Options Database Key

-tao_monitor -Use the default monitor, which prints statistics to standard output

See Also

TaoGetConvergedReason(), TaoDefaultMonitor(), TaoSetMonitor()

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