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I cannot find any option in configuration file. How to set this probability? I have gone through config description file also https://neat-python.readthedocs.io/en/latest/config_file.html and there is no such option.

abhi
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1 Answers1

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My guess is it is this

survival_threshold
The fraction for each species allowed to reproduce each generation. This defaults to 0.2.

but I feel the default is low. Would have expected something around 0.7.

So put 

[DefaultReproduction]
survival_threshold = 0.7 (or whatever you want to set it to)

in your configuration file

Matt Cremeens
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  • survival threshold with some value say 0.7 selects only 70% of best fit individuals from current population. Now these selected individuals are allowed to reproduce using crossover and mutation. Config file has mutation probability but no option for crossover probability. – abhi Oct 07 '18 at 10:16
  • Yes. That means 70% of those solutions are allowed to mate using crossover, I believe. – Matt Cremeens Oct 07 '18 at 19:18