This package is to be put in lil-gp's app/ directory. I used lil-gp 1.1 version. The includes a lambda-calculus beta-reducing module.
The GP setup tries to find f(x)=2x function.
The code for it is embedded in the app_eval_fitness C function
in app.c
as correct = Cchurch_num(testcases[i]*2), along with test cases for x.
Other GP parameters are defined
in template.in.
The try executable script
drives multiple GP runs.
If you want to run a session just once, create input.file (of lil-gp)
from template.in
by replacing $ placeholders with desired number and file name.
To run this package, the PGPLOT library and some other libraries must be linked
(see GNUmakefile)
to render the progress of run visually to a PostScript file.
If you don't need this feature, remove cpg* stuff
from app.c
and adjust GNUmakefile.
Kazuto Tominaga, et al.: "An encoding scheme for generating lambda-expressions in genetic programming". In Proceedings of GECCO 2003, 2003.