Marek, This looks really good, and seems to be along the lines of stuff I've been working on. I like the fact that your using fortran to do some of the heavy computation, especially the GA. I'd like to contribute. I find that the rprop algorithm is the best for real-world-noisy data (besides GAs), and this could be an easy add. I have a python implementation that uses scipy to run rprop, there is definite room for improvement, I'm mainly using scipy.where() and wrote the function directly from the original rprop paper (i can send you this code if you'd like it). However, it may be faster to use fortran here as well. The original c version or rprop is here http://www.koders.com/c/fid1B403F9BA6B2BAA1C7CEDD1C680F8AAB2819B44E.aspx I also think that it would be great to have two versions of this. One for general usage and one for altivec and sse 64bit ibm and intel chips, which at this stage of the project would be easy to modify http://developer.apple.com/documentation/Performance/Conceptual/Accelerate_s... gcc 4.0.3 does some auto optimization with the right flags and I've found you can increase the speed by factors of 10 or more in many cases. What type of platforms do you have access to? The CHUD tools on OS X are very effective and might be useful (http://developer.apple.com/tools/performance/) to find optimizations relevant to all platforms. conor On 12/6/06, Emanuele Olivetti <olivetti@itc.it> wrote:

Marek Wojciechowski wrote:

...

Hi! I released feed-forward neural network for python project at sourceforge (ffnet). I'm announcing it here because it depends on numpy/scipy tandem, so you, folks, are potential users/testers :)

If anyone is interested please visit ffnet.sourceforge.net (and then post comments if any...)

Hi Marek, thank you for you ANN implementation. I'm currently interested in recurrent neural networks so I hope you'll add them too in near future ;)

Anyway, for those interested in ANN you can check conx.py module of PyRobotics project. It's just one python file (182Kb of python source!) inside a much bigger project. Conx.py is self contained and unfortunately it needs Numeric and not numpy :((

What about mixing ffnet and conx.py? ;)

Some links: http://www.pyrorobotics.org/ - main site http://www.pyrorobotics.org/?page=PyroModuleNeuralNetworks - conx module introduction http://cvs.cs.brynmawr.edu/cgi-bin/viewcvs.cgi/pyrobot/brain/conx.py - actual conx.py code http://www.pyrorobotics.org/?page=Building_20Neural_20Networks_20using_20Con... - conx example code

HTH

Emanuele

P.S.: both ffnet and conx.py are released under GPL. Good! _______________________________________________ SciPy-user mailing list SciPy-user@scipy.org http://projects.scipy.org/mailman/listinfo/scipy-user