Version 0.95b represents some straightforward but useful changes from
0.9b. The plan is to add ADFs to lil-gp and then
call it version 1. That will hopefully be sometime this summer. In
back to the lil-gp home page.
S-expression pretty printer. Program trees in the BST
file are now printed across multiple lines with indentation to show
Improved makefile. Makefile uses GNU make. The
aux directory contains the old makefiles, if you can't use gmake.
Makefiles split into application and kernel portions to ease kernel
Two-phase population exchange. Separated
subpopulation exchange into separate "to" and "from" phases, allowing
different selection methods and exchange counts.
User callback changes. The app_new_best_of_run()
callback has been replaced by app_end_of_evaluation() and
app_end_of_breeding(). The two new callbacks are passed pointers to
the entire population so user code can access essentially anything
Parameter file "preprocessor directives". There is a
primitive set of C-like parameter file directives ("ifdef", "define",
etc.) so multiple sets of options can be contained in one parameter
Improved output files. The STT file contains
statistics for each subpopulation in addition to the overall
population. The "output.stt_interval" parameter controls how often
(in generations) information is written to the STT file. Program
responds to "output.detail" parameter so, for instance, the huge PRG
and GEN files aren't written by default.
New sample problem. The "pursuer/evader" problem
from Koza's first book has been added to the lil-gp
Bug fixes. "inverse_fitness" selection method didn't
work. Regression problem seg faulted under Linux. Note past tense on
lil-gp changes for version 0.95,
last modified 4/10/1995