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Navigation: Code Documentation > GeneticAlgorithm > RSGeneticAlgorithm > Classes

TRSGAPopulation Class

Represents the entire population (the collection of RSGeneticAlgorithm.TRSGAIndividual items) in a Genetic Algorithms problem. The population class represents the set of candidate solutions in a genetic algorithm problem. In genetic algorithms ( RSGeneticAlgorithm.TRSGeneticAlgorithm component), there is a population of individuals (TRSGAPopulation), which contain chromosomes ( Bits property). These chromosomes are used to abstractly represent the solution to the search problem. They represent through their bits the DNA of each candidate solution (or individual), represented by a TRSGAIndividual class. The chromosomes are created by taking the parameters or factors (integers, booleans, floats, and enumerations) of your search problem and concatenating them together into a sequence of bits.

Genetic Algorithms then work by evolving your population towards the solution of the problem. Parents are selected from the current generation to reproduce the children of the next generation. Evolving a new generation involves:

• Selecting 2 parents (Individuals) to reproduce

• Splicing the chromosomes of the 2 parents together to make a child (the child inherits the parents chromosomes)

• Optionally Mutating and Inverting the chromosome of the child to provide randomness

• Repeating the above steps until the population of the new generation has been produced.

Namespace: RSGeneticAlgorithm

	Name	Description
	Items[Integer]	Lists the individuals of the population object. Use the Items property to iterate through all the individuals. Index identifies the index in the range 0 to Count - 1.

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	Name	Description
	Add	Creates a new individual (TRSGAIndividual) and adds it to the Items array. Call Add to create an individual or solution in the collection. The new individual is placed at the end of the Items array. The Add method returns the new individual.
	FindItemID(Integer)	Returns the Item with the specified ID. The FindItemID method returns the item in the collection whose ID property is passed to it as a parameter. If no item has the specified ID, FindItemID returns nil.
	Insert(Integer)	Creates a new individual and adds it to the Items array. Call Insert to add a new individual at a specified position in the collection. Existing items (starting from the specified position) are moved up in the Items array. Insert returns the new individual.
	LoadFromXML(IXMLChromosomes)	Overloaded. Loads an entire population and their chromosome from the XML parameter. The old population is first cleared.
	LoadFromXML(IXMLNode)	Overloaded. Loads an entire population and their dna from the XML parameter. The old population is first cleared. (Overrides RSGeneticBase.TRSPopulation.LoadFromXML(IXMLNode).)
	Notify(TCollectionItem,TCollectionNotification)	Represents method Notify(TCollectionItem,TCollectionNotification). (Inherited from RSGeneticBase.TRSPopulation.)
	Owner	Returns the RSGeneticAlgorithm.TRSCustomGeneticAlgorithm that owns the population.
	SaveToXML(IXMLChromosomes)	Overloaded. Saves every individual of the population and its chromosomes to the XML parameter.
	SaveToXML(IXMLNode)	Overloaded. Saves every individual of the population and its chromosomes to the XML parameter. (Overrides RSGeneticBase.TRSPopulation.SaveToXML(IXMLNode).)
	Update(TCollectionItem)	Represents method Update(TCollectionItem). (Inherited from RSGeneticBase.TRSPopulation.)

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