January 2020
Intermediate to advanced
346 pages
9h 8m
English
Content preview from Hands-On Genetic Algorithms with Python
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Roulette wheel selection
In the roulette wheel selection method, also known as fitness proportionate selection (FPS), the probability for selecting an individual is directly proportionate to its fitness value. This is comparable to using a roulette wheel in a casino and assigning each individual a portion of the wheel proportional to its fitness value. When the wheel is turned, the odds of each individual being selected are proportional to the size of the portion of the wheel that it occupies.
For example, suppose we have a population of six individuals with fitness values as shown in the following table. The relative portion of the roulette wheel dedicated to each individual is calculated based on these fitness values:
| Individual | Fitness ... |
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