ultra::de::problem Class Reference

#include <problem.h>

Inheritance diagram for ultra::de::problem:

Public Member Functions
	problem (std::size_t, const interval< double > &)
	problem (const std::vector< interval< double > > &)
std::size_t	parameters () const noexcept
template<symbol_set::weight_t = symbol_set::default_weight>
real *	insert (const interval< double > &, symbol::category_t=symbol::undefined_category)
Public Member Functions inherited from ultra::problem
template<Symbol S, symbol_set::weight_t = symbol_set::default_weight, class ... Args> requires std::constructible_from<S, Args...>
std::add_pointer_t< S >	insert (Args &&...)
template<std::derived_from< function > F, symbol_set::weight_t W = symbol_set::default_weight, std::convertible_to< symbol::category_t > C = symbol::category_t>
std::add_pointer_t< F >	insert (symbol::category_t, std::initializer_list< C >)
template<std::derived_from< function > F, symbol_set::weight_t W = symbol_set::default_weight, std::convertible_to< symbol::category_t > C = symbol::category_t>
std::add_pointer_t< F >	insert (std::initializer_list< C >)
virtual bool	is_valid () const

Additional Inherited Members
Public Attributes inherited from ultra::problem
parameters	params {}
symbol_set	sset {}

Detailed Description

Provides a DE-specific interface to the generic problem class.

The class is a facade that provides a simpler interface to represent DE-specific problems.

Examples

rastrigin.cc, and scheduling.cc.

Constructor & Destructor Documentation

problem() [1/2]

ultra::de::problem::problem	(	std::size_t	nparam,
		const interval< double > &	itval )

Sets up a DE problem for which a solution has the given number of (uniform, same range) parameters.

Parameters

[in]	nparam	number of parameters (aka genes in the chromosome)
[in]	itval	a half-open interval (the value of each parameter falls within this range)

The typical solution of a numerical optimization problem can often be represented as a sequence of real numbers in a given range (and this is the raison d'etre of this constructor).

problem() [2/2]

ultra::de::problem::problem ( const std::vector< interval< double > > & intervals )

explicit

Sets up a DE problem for which a solution has the given number of (uniform but not same range) parameters.

Parameters

[in]

intervals

a sequence of half-open intervals (one for each parameter)

This is a more flexible form of the other constructor. Each parameter has its own range.

Member Function Documentation

insert()

template<symbol_set::weight_t W>

real * ultra::de::problem::insert	(	const interval< double > &	itval,
		symbol::category_t	category = symbol::undefined_category )

Adds a de::real terminal to the internal symbol set.

Parameters

[in]	itval	the half open interval for the real terminal
[in]	category	an optional category

Returns

a raw pointer to the symbol just added (or nullptr in case of error)

parameters()

std::size_t ultra::de::problem::parameters ( ) const

nodiscardnoexcept

Returns

genome size / number of parameters / elements in the container

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

• de/problem.h
• de/problem.cc