IMP::example::ExampleUnaryFunction Class Reference

A simple unary function. More...

#include <IMP/example/ExampleUnaryFunction.h>

Inheritance diagram for IMP::example::ExampleUnaryFunction:

Detailed Description

A simple unary function.

This one happens to be a harmonic. The source code is as follows:

/**
 *  \file IMP/example/ExampleUnaryFunction.h
 *  \brief A simple unary function.
 *
 *  Copyright 2007-2015 IMP Inventors. All rights reserved.
 *
 */

#ifndef IMPEXAMPLE_EXAMPLE_UNARY_FUNCTION_H
#define IMPEXAMPLE_EXAMPLE_UNARY_FUNCTION_H

#include <IMP/example/example_config.h>
#include <IMP/UnaryFunction.h>
#include <IMP/utility.h>

IMPEXAMPLE_BEGIN_NAMESPACE

//! A simple unary function
/** This one happens to be a harmonic.
    The source code is as follows:
    \include ExampleUnaryFunction.h

    \note The class does not have an IMPEXAMPLEEXPORT
    since it is all defined in a header.
 */
class ExampleUnaryFunction : public UnaryFunction {
  Float center_;
  Float k_;

 public:
  /** Create with the given center and spring constant. While it
      is generally bad form to have two Float arguments, it is
      hard to avoid here, and there is a bit of a sanity check.*/
  ExampleUnaryFunction(Float center, Float k) : center_(center), k_(k) {
    IMP_USAGE_CHECK(k > 0, "The spring constant must be positive.");
  }

  virtual DerivativePair evaluate_with_derivative(double feature) const
      IMP_OVERRIDE {
    return DerivativePair(evaluate(feature), k_ * (feature - center_));
  }
  virtual double evaluate(double feature) const IMP_OVERRIDE {
    return .5 * k_ * algebra::get_squared(feature - center_);
  }
  IMP_OBJECT_METHODS(ExampleUnaryFunction);
};

IMPEXAMPLE_END_NAMESPACE

#endif /* IMPEXAMPLE_EXAMPLE_UNARY_FUNCTION_H */

Note

The class does not have an IMPEXAMPLEEXPORT since it is all defined in a header.

Definition at line 26 of file ExampleUnaryFunction.h.

Public Member Functions
	ExampleUnaryFunction (Float center, Float k)
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. More...
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 ()
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...
virtual void	do_destroy ()

Constructor & Destructor Documentation

IMP::example::ExampleUnaryFunction::ExampleUnaryFunction	(	Float	center,
		Float	k
	)

Create with the given center and spring constant. While it is generally bad form to have two Float arguments, it is hard to avoid here, and there is a bit of a sanity check.

Definition at line 34 of file ExampleUnaryFunction.h.

Member Function Documentation

virtual double IMP::example::ExampleUnaryFunction::evaluate ( double  feature ) const

virtual

Calculate score with respect to the given feature.

Parameters

[in]

feature

Value of feature being tested.

Returns

Score

Reimplemented from IMP::kernel::UnaryFunction.

Definition at line 42 of file ExampleUnaryFunction.h.

virtual DerivativePair IMP::example::ExampleUnaryFunction::evaluate_with_derivative ( double  feature ) const

virtual

Calculate score and derivative with respect to the given feature.

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.

Definition at line 38 of file ExampleUnaryFunction.h.

virtual ::IMP::base::VersionInfo IMP::example::ExampleUnaryFunction::get_version_info ( ) const

virtual

Get information about the module and version of the object.

Reimplemented from IMP::base::Object.

Definition at line 45 of file ExampleUnaryFunction.h.

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

• ExampleUnaryFunction.h