December 2019
Intermediate to advanced
368 pages
11h 10m
English
Content preview from Hands-On Neuroevolution with Python
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DefaultStagnation section
This section defines parameters that are specific to the species stagnation routines, as implemented by the DefaultStagnation class. This section includes the following parameters:
- species_fitness_func: The name of a function that's used to compute species fitness, that is, to calculate the aggregate fitness value of all the organisms belonging to a particular species. The allowed values are max, min, and mean.
- max_stagnation: The species that have not shown an improvement in the fitness value calculated by species_fitness_func in more than max_stagnation number of generations are considered stagnant and are subject to extinction.
- species_elitism: The number of species to unconditionally protect from stagnation. ...
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