changes

这是遗传算法的源代码

Changes made by Luis de la Ossa and Kumara Sastry. 

Date: March 24, 2006

These are the changes from ECGA version 1.1 to deal with problems with integer variables 
(chi-ary alphabets). In the inputfile, after the chromosome length, cardinality of each 
variable has to be specified.

chromosome_length              12
values_per_gene		       4 6 4 6 4 6 8 2 10 2 6 2

When programming the objective function, one can access the cardinality of an ith gene using
parameter::ranges[i].

The test problem provided with the code takes m groups of (k=4) variables and sums the m subfunctions.
Each subfunction returns the sum of the four variables except if such sum is 0. Then it returns
the sum of cardinalities of the four variables plus one. For example, in the first block of the 
example it would be 4+6+4+6 = 20 + 1 = 21.

-----------------Modified files ----------------------------------

parameters.hpp: Added a vector "ranges" which contains the cardinality of each variable.
main.cpp :      Modified to read the list of ranges for each variable.
chromosome.cpp: Since the objective function will use arrays of integers, a function converts
                each chromosome to such array. 
gene.cpp:       The gene is now position dependent and so is the mutatation and random generation.
utility.cpp:    Added functions to encode/decode numbers basing on the cardinality of each variable.
MPM.cpp:        Some small changes.
objfunc.hpp:    Must be modified for each objective function.


-----------------Un-Modified files -----------------------------
cache.hpp
cache.cpp
chromosome.hpp
ecga.hpp
ecga.cpp
gene.hpp
intlist.hpp
intlist.cpp
subset.hpp