###
### emulate the operation of the "Simple LISP Code", from the
### appendix of _Genetic Programming_ (Koza).
###

###
### if you increase the population size to 1000 or more, change the
### selection methods to "fitness_overselect".
###

max_depth = 17

probabilistic_operators = no
breed_phases = 4

breed[1].rate = 0.7                  # fill 70% of the population...
breed[1].operator = crossover, \     # ...by functionpoint crossover.
         select = fitness, \
         internal = 1.0

breed[2].rate = 0.2                  # fill 20% of the population...
breed[2].operator = crossover, \     # ...by anypoint crossover.
         select = fitness, \
         internal = 0.0, \
         external = 0.0

breed[3].rate = 0.1                  # fill 10% of the population...
breed[3].operator = reproduction, \  # ...by reproduction.
         select = fitness

breed[4].rate = 0.0                # fill 0% of the population...
breed[4].operator = mutation, \    # ...by mutation.
         select = fitness, \
         method = grow, \
         depth = 0-4