Page 176 - 49A Field Guide to Genetic Programming

162 B TinyGP

364 newind = cr o s s o ve r ( pop [ parent1 ] , pop [ parent2 ] ) ;
365 }
366 else {
367 parent = tournament ( f i t n e s s , TSIZE ) ;
368 newind = mutation ( pop [ parent ] , PMUT PER NODE ) ;
369 }
370 newfit = f i t n e s s f u n c t i o n ( newind ) ;
371 o f f s p r i n g = negative tournament ( f i t n e s s , TSIZE ) ;
372 pop [ o f f s p r i n g ] = newind ;
373 f i t n e s s [ o f f s p r i n g ] = newfit ;
374 }
375 s t a t s ( f i t n e s s , pop , gen ) ;
376 }
377 System . out . print ( ”PROBLEM ∗NOT∗ SOLVED\n” ) ;
378 System . e x i t ( 1 ) ;
379 }
380
381 public static void main ( String [ ] args ) {
382 String fname = ”problem . dat” ;
383 long s = −1;
384
385 i f ( args . length == 2 ) {
386 s = Integer . valueOf ( args [ 0 ] ) . intValue () ;
387 fname = args [ 1 ] ;
388 }
389 i f ( args . length == 1 ) {
390 fname = args [ 0 ] ;
391 }
392
393 tiny gp gp = new tiny gp ( fname , s ) ;
394 gp . evolve () ;
395 }
396 };

B.4 Compiling and Running TinyGP

It is very common, nowadays, for people to write and execute code within
some development environment. Each has its own way of doing these oper-
ations, but the process is typically very straightforward.
If one wants to compile TinyGP from the operating system’s shell, this
can be done by issuing the command javac -O tiny gp.java. This applies
to both Unix and Windows users. Windows users will have to click on
Start→Run and then issue the command cmd to launch a shell. Of course,
if the javac Java compiler and/or the tiny gp.java source file are not in
the current directory/folder, then full path names must be provided when
issuing the compilation command.
If the dataset is stored in a file problem.dat, the program can then
simply be launched with the command java tiny gp. Otherwise, the user
can specify a different datafile on the command line, by giving the command