libevocosm::function_solution Class Reference

A potential solution to the problem at hand. More...

#include <function_optimizer.h>

Inheritance diagram for libevocosm::function_solution:

Public Member Functions
	function_solution ()
	Default contructor. More...
	function_solution (int a_nargs, double a_minarg, double a_maxarg)
	Creation constructor. More...
	function_solution (const vector< double > &a_source)
	Construct from raw genes. More...
	function_solution (const organism< vector< double > > &a_source)
	Construct from base class. More...
	function_solution (const function_solution &a_source)
	Copy constructor. More...
virtual	~function_solution ()
	Virtual destructor. More...
function_solution &	operator= (const function_solution &a_source)
	Assignment operator. More...
virtual bool	operator< (const organism< vector< double > > &a_right) const
	Comparison operator for algorithms. More...
Public Member Functions inherited from libevocosm::organism< vector< double > >
	organism ()
	Creation constructor. More...
	organism (const vector< double > &a_genes)
	Value constructor. More...
	organism (const organism &a_source)
	Copy constructor. More...
virtual	~organism ()
	Virtual destructor. More...
organism &	operator= (const organism &a_source)
	assignment operator More...
organism &	operator= (const vector< double > &a_genes)
	assignment operator More...
virtual bool	operator< (const organism &a_right) const
	Comparison operator for algorithms. More...
virtual void	reset ()
	Resets an object to it's initial state. More...

Public Attributes
double	value
Public Attributes inherited from libevocosm::organism< vector< double > >
double	fitness
vector< double >	genes

Protected Member Functions
virtual void	child_copy (const organism &a_source)

Additional Inherited Members
Protected Types inherited from libevocosm::fopt_global
typedef vector< double >	t_function (vector< double > a_args)
	Definition of a function type. More...
Static Protected Member Functions inherited from libevocosm::globals
static size_t	rand_index (size_t n)
	Static function to allow use of g_random function pointer in random_shuffle.
static void	set_seed (uint32_t a_seed)
	Set the seed for the random number generator.
static uint32_t	get_seed ()
	Set the seed for the random number generator.
static std::string	version ()
	Get version number.
Static Protected Attributes inherited from libevocosm::globals
static prng	g_random
	A shared random number generator.
static std::string	g_version
	Version number.
Static Protected Attributes inherited from libevocosm::fopt_global
static evoreal	g_evoreal
	Provides mutation and crossover services for doubles.

Detailed Description

To support a wide variety of applications, I defined a function solution as a vector of doubles. This allows functions of any dimension to be optimized (within platform limits, of course). Note that the solution begins with an empty vector; this is because the number of elements and their initialization is application specific. Initialization of the genes takes place in the constructor for function_optimizer through a pointer to a user-supplied function.

Constructor & Destructor Documentation

libevocosm::function_solution::function_solution ( )

inline

Creates an empty solution.

libevocosm::function_solution::function_solution ( int  a_nargs, double  a_minarg, double  a_maxarg  )

inline

Creates a new solution with an empty vector.

References libevocosm::globals::g_random, libevocosm::organism< vector< double > >::genes, and libevocosm::prng::get_real().

libevocosm::function_solution::function_solution ( const vector< double > &  a_source )

inline

Constructs a new function solution from a set of genes

libevocosm::function_solution::function_solution ( const organism< vector< double > > &  a_source )

inline

Constructs a function solution from a base-class object.

Parameters

a_source

- The source object

libevocosm::function_solution::function_solution ( const function_solution &  a_source )

inline

Duplicates an existing object.

Parameters

a_source

- The source object

virtual libevocosm::function_solution::~function_solution ( )

inlinevirtual

Satisfies the requirements of the base class; does nothing

Member Function Documentation

virtual void libevocosm::function_solution::child_copy ( const organism &  a_source )

inlineprotectedvirtual

used to cast base class pointer to concrete class

References value.

virtual bool libevocosm::function_solution::operator< ( const organism< vector< double > > &  a_right ) const

inlinevirtual

Returns true if the target object is greater than a_source. While the operator may be "less than", what it really meands for algorithms is "comes before" – and I want the highest fitness to come first.

Parameters

a_right

- Right hand argument for less than operator

Returns

true if this organismsfitness if greater than a_right.fitness; false otherwise

References libevocosm::organism< vector< double > >::fitness.

function_solution& libevocosm::function_solution::operator= ( const function_solution &  a_source )

inline

Assigns the state of one solution to another.

Parameters

a_source

- The source object

Returns

A reference to this

References value.

Member Data Documentation

double libevocosm::function_solution::value

Value is the actual computed value of this solution, which may or may not correspond directly to fitness. For example, when minimizing a function, the lowest value may correspond to the highest fitness. Generally, this is a display property.

Referenced by child_copy(), operator=(), and libevocosm::function_landscape::test().

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

• function_optimizer.h