TaoSetRecycleHistory#
Sets the boolean flag to enable/disable re-using iterate information from the previous TaoSolve(). This feature is disabled by default.
Synopsis#
#include "petsctao.h"
PetscErrorCode TaoSetRecycleHistory(Tao tao, PetscBool recycle)
Logically Collective
Input Parameters#
tao - the
Taocontextrecycle - boolean flag
Options Database Key#
-tao_recycle_history <true,false> - reuse the history
Notes#
For conjugate gradient methods (TAOBNCG), this re-uses the latest search direction
from the previous TaoSolve() call when computing the first search direction in a
new solution. By default, CG methods set the first search direction to the
negative gradient.
For quasi-Newton family of methods (TAOBQNLS, TAOBQNKLS, TAOBQNKTR, TAOBQNKTL), this re-uses
the accumulated quasi-Newton Hessian approximation from the previous TaoSolve()
call. By default, QN family of methods reset the initial Hessian approximation to
the identity matrix.
For any other algorithm, this setting has no effect.
See Also#
TAO: Optimization Solvers, Tao, TaoGetRecycleHistory(), TAOBNCG, TAOBQNLS, TAOBQNKLS, TAOBQNKTR, TAOBQNKTL
Level#
intermediate
Location#
Examples#
src/tao/unconstrained/tutorials/rosenbrock3.c
Index of all Tao routines
Table of Contents for all manual pages
Index of all manual pages