genetic_algorithms | Simple demonstration of Evolution of Neural Networks | Machine Learning library
kandi X-RAY | genetic_algorithms Summary
kandi X-RAY | genetic_algorithms Summary
Essentially, Genetic Algorithms (GA) are a method of "breeding" computer programs and solutions to optimization or search problems by means of simulated evolution. Processes loosely based on natural selection, crossover, and mutation are repeatedly applied to a population of neural networks which represent potential solutions. Over time, the number of above-average individuals increases, and better fit individuals are created, until a good solution to the problem at hand is found. Our genetic algorithm works with not one but multiple populations, all of which in a large degree evolve separately except for minor interbreeding where we allow different populations to mix with each other.
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QUESTION
I read the tutorial on TutorialsPoint and this question and answer on StackOverflow. However, I still do not understand the meaning of Crossover Probability in the Parent Selection and Crossover process of a genetic algorithm.
Say I have a population of size 100 and the crossover probability is 0.9. What does it mean? Do I:
- select precisely 10 parents (since 90 % of offsprings shall be made by crossover), or
- run a RNG 100 times and for each time the 0.9 probability fails, I select a parent?
Then, the parents are somehow crossed over and some individuals mutate. Does the population need to have exactly 100 members at this point, or there is an additional selection of which individuals make it to the next generation?
...ANSWER
Answered 2018-Dec-28 at 16:28Its not exactly 10 parents, on average 10 parents. Following is the pseudo code, which I follows.
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