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IMP Reference Guide  2.15.0
The Integrative Modeling Platform
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 2007-2021 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/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
return DerivativePair(evaluate(feature), k_ * (feature - center_));
}
virtual double evaluate(double feature) const IMP_OVERRIDE {
return .5 * k_ * algebra::get_squared(feature - center_);
}
};
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::VersionInfo get_version_info () const
 Get information about the module and version of the object. More...
 
- Public Member Functions inherited from IMP::UnaryFunction
 UnaryFunction (std::string name="UnaryFunction%1%")
 
- Public Member Functions inherited from IMP::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::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]featureValue of feature being tested.
Returns
Score

Reimplemented from IMP::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]featureValue of feature being tested.
Returns
a DerivativePair containing the score and its partial derivative with respect to the given feature.

Reimplemented from IMP::UnaryFunction.

Definition at line 38 of file ExampleUnaryFunction.h.

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

Get information about the module and version of the object.

Reimplemented from IMP::Object.

Definition at line 45 of file ExampleUnaryFunction.h.


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