Reference documentation for deal.II version Git 4a2ac69 2017-09-19 13:41:17 -0400
Public Member Functions | Protected Attributes | List of all members
ConsecutiveControl Class Reference

#include <deal.II/lac/solver_control.h>

Inheritance diagram for ConsecutiveControl:
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Public Member Functions

 ConsecutiveControl (const unsigned int maxiter=100, const double tolerance=1.e-10, const unsigned int n_consecutive_iterations=2, const bool log_history=false, const bool log_result=false)
 
 ConsecutiveControl (const SolverControl &c)
 
ConsecutiveControloperator= (const SolverControl &c)
 
virtual ~ConsecutiveControl ()=default
 
virtual State check (const unsigned int step, const double check_value)
 
- Public Member Functions inherited from SolverControl
 SolverControl (const unsigned int n=100, const double tol=1.e-10, const bool log_history=false, const bool log_result=true)
 
virtual ~SolverControl ()=default
 
void parse_parameters (ParameterHandler &param)
 
State last_check () const
 
double initial_value () const
 
double last_value () const
 
unsigned int last_step () const
 
unsigned int max_steps () const
 
unsigned int set_max_steps (const unsigned int)
 
void set_failure_criterion (const double rel_failure_residual)
 
void clear_failure_criterion ()
 
double tolerance () const
 
double set_tolerance (const double)
 
void enable_history_data ()
 
const std::vector< double > & get_history_data () const
 
double average_reduction () const
 
double final_reduction () const
 
double step_reduction (unsigned int step) const
 
void log_history (const bool)
 
bool log_history () const
 
unsigned int log_frequency (unsigned int)
 
void log_result (const bool)
 
bool log_result () const
 
- Public Member Functions inherited from Subscriptor
 Subscriptor ()
 
 Subscriptor (const Subscriptor &)
 
 Subscriptor (Subscriptor &&)
 
virtual ~Subscriptor ()
 
Subscriptoroperator= (const Subscriptor &)
 
Subscriptoroperator= (Subscriptor &&)
 
void subscribe (const char *identifier=nullptr) const
 
void unsubscribe (const char *identifier=nullptr) const
 
unsigned int n_subscriptions () const
 
void list_subscribers () const
 
template<class Archive >
void serialize (Archive &ar, const unsigned int version)
 

Protected Attributes

unsigned int n_consecutive_iterations
 
unsigned int n_converged_iterations
 
- Protected Attributes inherited from SolverControl
unsigned int maxsteps
 
double tol
 
State lcheck
 
double initial_val
 
double lvalue
 
unsigned int lstep
 
bool check_failure
 
double relative_failure_residual
 
double failure_residual
 
bool m_log_history
 
unsigned int m_log_frequency
 
bool m_log_result
 
bool history_data_enabled
 
std::vector< double > history_data
 

Additional Inherited Members

- Public Types inherited from SolverControl
enum  State { iterate = 0, success, failure }
 
- Static Public Member Functions inherited from SolverControl
static void declare_parameters (ParameterHandler &param)
 
static::ExceptionBase & ExcHistoryDataRequired ()
 
- Static Public Member Functions inherited from Subscriptor
static::ExceptionBase & ExcInUse (int arg1, char *arg2, std::string &arg3)
 
static::ExceptionBase & ExcNoSubscriber (char *arg1, char *arg2)
 

Detailed Description

Specialization of SolverControl which returns SolverControl::State::success if and only if a certain positive number of consecutive iterations satisfy the specified tolerance. This is useful in cases when solving nonlinear problems using inexact Hessian.

For example: The requested number of consecutively converged iterations is 2, the tolerance is 0.2. The ConsecutiveControl will return SolverControl::State::success only at the last step in the sequence 0.5, 0.0005, 1.0, 0.05, 0.01.

Author
Denis Davydov, 2017

Definition at line 540 of file solver_control.h.

Constructor & Destructor Documentation

ConsecutiveControl::ConsecutiveControl ( const unsigned int  maxiter = 100,
const double  tolerance = 1.e-10,
const unsigned int  n_consecutive_iterations = 2,
const bool  log_history = false,
const bool  log_result = false 
)

Constructor. n_consecutive_iterations is the number of consecutive iterations which should satisfy the prescribed tolerance for convergence. Other arguments have the same meaning as those of the constructor of the SolverControl.

Definition at line 345 of file solver_control.cc.

ConsecutiveControl::ConsecutiveControl ( const SolverControl c)

Initialize with a SolverControl object. The result will emulate SolverControl by setting n_consecutive_iterations to one.

Definition at line 361 of file solver_control.cc.

virtual ConsecutiveControl::~ConsecutiveControl ( )
virtualdefault

Virtual destructor is needed as there are virtual functions in this class.

Member Function Documentation

ConsecutiveControl & ConsecutiveControl::operator= ( const SolverControl c)

Assign a SolverControl object to ConsecutiveControl. The result of the assignment will emulate SolverControl by setting n_consecutive_iterations to one.

Definition at line 371 of file solver_control.cc.

SolverControl::State ConsecutiveControl::check ( const unsigned int  step,
const double  check_value 
)
virtual

Decide about success or failure of an iteration, see the class description above.

Reimplemented from SolverControl.

Definition at line 382 of file solver_control.cc.

Member Data Documentation

unsigned int ConsecutiveControl::n_consecutive_iterations
protected

The number of consecutive iterations which should satisfy the prescribed tolerance for convergence.

Definition at line 586 of file solver_control.h.

unsigned int ConsecutiveControl::n_converged_iterations
protected

Counter for the number of consecutively converged iterations.

Definition at line 591 of file solver_control.h.


The documentation for this class was generated from the following files: