Language Reference

GAGETMEM Call    -    Experimental

gets members of the current solution population for a genetic algorithm optimization

CALL GAGETMEM( members, values, id<, index >);

The GAGETMEM call returns the following values:

members

is a matrix representing the members of the current solution population specified by the index parameter.

values

is a matrix of objective function values, with the value at each row corresponding to the solution in members.

The inputs to the GAGETMEM call are as follows:

id

is the identifier for the genetic algorithm optimization problem, which was returned by the GASETUP function.

index

is a matrix of indices of the requested solution population members. If index is not specified the entire population is returned.

The GAGETMEM call is used to retrieve members of the solution population and their objective function values. If the elite parameter of the GASETSEL call is nonzero, then the first elite members of the population have the most optimal objective function values of the population, and those elite members are sorted in ascending order of objective function value for a minimization problem, and in descending order for a maximization problem.

If a single member is requested, that member is returned as-is in members. If more than one member is requested in a GAGETMEM call, each row of members has one solution, shaped into a row vector. If solutions are not of fixed length, then the number of columns of members equals the number of elements of the largest solution, and rows representing solutions with fewer elements have the extra elements filled in with missing values.

See the GASETUP function for an example.