IMP::core::Cosine Class Reference

Cosine function. More...

#include <IMP/core/Cosine.h>

Inheritance diagram for IMP::core::Cosine:

Public Member Functions
	Cosine (Float force_constant, int periodicity, Float phase)
	Constructor. More...
void	do_show (std::ostream &out) const
virtual double	evaluate (double feature) const
	Calculate score with respect to the given feature. More...
virtual DerivativePair	evaluate_with_derivative (double feature) const
	Calculate score and derivative with respect to the given feature. More...
virtual std::string	get_type_name () const
virtual ::IMP::base::VersionInfo	get_version_info () const
	Get information about the module and version of the object.
Public Member Functions inherited from IMP::kernel::UnaryFunction
	UnaryFunction (std::string name="UnaryFunction%1%")
Public Member Functions inherited from IMP::base::Object
virtual void	clear_caches ()
virtual void	do_destroy ()
CheckLevel	get_check_level () const
LogLevel	get_log_level () const
void	set_check_level (CheckLevel l)
void	set_log_level (LogLevel l)
	Set the logging level used in this object. More...
void	set_was_used (bool tf) const
void	show (std::ostream &out=std::cout) const
const std::string &	get_name () const
void	set_name (std::string name)

Additional Inherited Members
Protected Member Functions inherited from IMP::base::Object
	Object (std::string name)
	Construct an object with the given name. More...
	Object ()

Detailed Description

This evaluates the function |k| - k cos(nf + a) where k is a force constant, n the periodicity, a the phase, and f the input value. This is most commonly used for dihedral angle restraints, e.g. in the CHARMM force field.

Definition at line 23 of file Cosine.h.

Constructor & Destructor Documentation

IMP::core::Cosine::Cosine	(	Float	force_constant,
		int	periodicity,
		Float	phase
	)

Parameters

[in]	force_constant	Force constant (score units)
[in]	periodicity	Periodicity (generally 1-6)
[in]	phase	Phase (radians)

Definition at line 30 of file Cosine.h.

Member Function Documentation

virtual double IMP::core::Cosine::evaluate ( double  feature ) const

virtual

Parameters

[in]

feature

Value of feature being tested.

Returns

Score

Reimplemented from IMP::kernel::UnaryFunction.

virtual DerivativePair IMP::core::Cosine::evaluate_with_derivative ( double  feature ) const

virtual

Parameters

[in]

feature

Value of feature being tested.

Returns

a FloatPair containing the score and its partial derivative with respect to the given feaure.

Reimplemented from IMP::kernel::UnaryFunction.

---

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

• Cosine.h