Here you can download the current version of the GPLAB toolbox and user's manual. You may want to check its features.


Version 3 (April 2007):

• toolbox files: gplab.toolbox.3.zip (151 files, 140KB)
• additional files for Octave only: gplab.octave.3.zip (9 files, 4KB)
• user's manual (73 pages): gplab.manual.3.pdf (526KB) or gplab.manual.3.ps.zip (929KB)

Update from previous version:

From the user's manual, section 1.1 (Update from version 2.x):

"Version 3 implements several additional techniques for bloat control. Many of these techniques are new and rely on a dynamically changing population size, acting along the survival process. Another technique is based on the adjustment of fitness according to size, which implied keeping track of both the adjusted fitness and the raw fitness (equal when there is no adjustment), and using the adjusted values along the selection process. All this implied major changes, resulting in a large extension of the operational structure itself. As always, modularity has been a priority, and GPLAB can now easily adopt new survival methods as well as new fitness adjustment functions."

Other important changes:

• Implementation of the 11-multiplexer problem
• Workaround to the "nesting 32" error that was issued when using the later releases of MATLAB (see the acknowledgements). But I strongly advise you to complain about this to The MathWorks so they do something about it.
• Implementation of a definite solution that replaces the temporary fix released with the "Bug fixes for Version 2 (August-September 2004)" (see older versions)
• Minor changes to ensure minimal compatibility with Octave (except where graphical output is concerned)

Here is a list of significant changes made to the user's manual:

• Sections 1.1 Update from version 2.x and 1.2 Acknowledgements
• Subsection 2.3.1 The layman - updated demo descriptions
• Tables 3.1 and 3.2 - updated with new and modified parameters
• Section 3.2 Tree depth and size limits - description of new parameter
• Section 3.4 Genetic operators - new genetic operators, other changes related mainly to the adjusted fitness
• Section 3.6 Selection for reproduction - description of new and modified parameters, and new tournament type
• Sections 3.8 Measuring fitness - data files and 3.9 Measuring fitness - raw and adjusted (previously only one section) - updated with description of new method for calculating fitness and with description of the fitness adjustment procedure
• Section 3.12 Survival - description of new and modified parameters
• Sections 3.13 Limited resources and 3.14 Dynamic populations (new sections)
• Section 3.15 Operator probabilities in runtime - updated description of modified parameters
• Section 3.18 Saving results to file - description of new parameter
• Table 4.1 - updated with the new and modified state variables
• Section 4.1 Population - description of new state variables and new fields of the individuals
• Section 4.2 Tree depth/size - deleted description of removed state variable
• Section 4.4 Operator probabilities and frequencies - description of new state variable
• Section 4.5 Population fitness - description of new and modified state variables
• Section 4.6 Fitness statistics - description of new state variable
• Section 4.8 Control - description of new state variables
• Section 4.10 Resources and variable size populations (new section)
• Chapter 6 - Summary of toolbox functions - updated with new functions
• Appendices A and B (new)