Archive

Archive#

template<ProgramType T>
struct Archive#

The Archive struct represents a collection of individual programs.

The Archive struct is used to store individual programs in a collection. It provides functionality for initializing, updating, and sorting the archive based on complexity or objectives. The archive can be operated on by a single thread.

Template Parameters:

T – The program type.

Public Functions

Archive()#

Default constructor for the Archive struct.

void init(Population<T> &pop)#

Initializes the archive with individuals from a population.

Parameters:

pop – The population from which to initialize the archive.

void update(Population<T> &pop, const Parameters &params)#

Updates the archive with individuals from a population.

Parameters:

  • pop – The population from which to update the archive.

  • params – The parameters for the update.

void set_objectives(vector<string> objectives)#

Sets the objectives for the archive.

This function sets the objectives for the archive. The objectives are used for sorting the archive.

Parameters:

objectives – The objectives to set for the archive.

Public Members

vector<Individual<T>> individuals#

individual programs in the archive

bool sort_complexity#

whether to sort archive by complexity

NSGA2<T> selector#

using NSGA2 in survival mode (nsga2 does not implement selection)

Public Static Functions

static bool sortComplexity(const Individual<T> &lhs, const Individual<T> &rhs)#

Sorts the population in increasing complexity.

This static function is used to sort the population in increasing complexity. It is used as a comparison function for sorting algorithms.

Parameters:

  • lhs – The left-hand side individual to compare.

  • rhs – The right-hand side individual to compare.

static bool sortObj1(const Individual<T> &lhs, const Individual<T> &rhs)#

Sorts the population by the first objective.

This static function is used to sort the population by the first objective. It is used as a comparison function for sorting algorithms.

Parameters:

  • lhs – The left-hand side individual to compare.

  • rhs – The right-hand side individual to compare.

static bool sameFitComplexity(const Individual<T> &lhs, const Individual<T> &rhs)#

Checks if two individuals have the same fitness complexity.

This static function is used to check if two individuals have the same fitness complexity. It is used as a comparison function for finding duplicates in the population.

Parameters:

  • lhs – The left-hand side individual to compare.

  • rhs – The right-hand side individual to compare.

static bool sameObjectives(const Individual<T> &lhs, const Individual<T> &rhs)#

Checks if two individuals have the same objectives.

This static function is used to check if two individuals have the same objectives. It is used as a comparison function for finding duplicates in the population.

Parameters:

  • lhs – The left-hand side individual to compare.

  • rhs – The right-hand side individual to compare.

Contents