Lisp

Principal Component Analysis
Is there a library available to perform PCA (Principal Comonent Analysis) in Lisp? I read about Lisp-Stat ( http://www.cs.uiowa.edu/~luke/xls/xlsinfo/ ) but I don't know if it has PCA and it looks not so updated. Thanks, Carlo ... 22 May 2010 17:06

defstruct, consistency checking
Hi, I am considering migrating part of some code from classes to structures. I am doing this because I read that structures can lead to gains in speed in some cases. The code is mature now, and I expect few changes. I am not using the MOP or anything fancy, so I guess structs should work fine. I have a gener... 23 May 2010 09:11

mod_lisp, apache
I put mod_lisp.so file in apache/modules directory and have this in httpd.conf file: LoadModule lisp_module modules/mod_lisp.so LispServer 127.0.0.1 3000 "fractal" <Location /asp> SetHandler lisp-handler </Location> When I point my browser to http://localhost/asp/test.lisp (test.lisp only has (+ 1 2) ju... 22 May 2010 07:16

Parenscript question
For those of you who have experience with Parenscript: (ps (loop for i from 0 to 100 do ((@ document write) (list i (random 1.0))))) translate to: "for (var i = 0; i <= 100; i += 1) { document.write([i, Math.floor(1.0 * Math.random())]); };" Where does the Math.floor come from! It's not supposed to be the... 21 May 2010 08:23

GUI stuff
I'm searching for opinions: What combination of packages work best for developing apps complete with GUI on Windows systems? I've had great luck catching up with LISP using Lispbox, but I guess I'm ready to creat apps that run and look as sophisticated as those I create in VB or C++ . Thanks, Mike ---... 24 May 2010 19:02

Unexpected relative performance
I thought that PRINC was more low-level than FORMAT thus more efficient. Apparently I am wrong. Using SBCL i tried two versions of the following method (switching commented lines) : (defmethod octave-save ((a generic-matrix) (file pathname) &key (octave-name "IMPORTEDDATA") &allow-other-keys) (declare (optimi... 20 May 2010 10:32

How to a matrix from a file
Hi all I have a txt file like below: 1 2 3 4 5 6 2 3 4 5 6 7 8 9 1 7 6 7 4 5 6 1 4 7 How can I read these data into a nested list? If the data is string or char, is there any difference to do it? Best Regards, ... 20 May 2010 10:32

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ANNC: qooxlisp the proof-of-concept
That was quick, albeit truly bare-boned and truly proof-of-concept: http://wiki.github.com/kennytilton/qooxlisp/ Over the rest of the week I'll try to flesh out the apropos example as much as possible so it won't be so proof-of-concepty, then I need to get back to the Algebra app". Of course qooxlisp wil... 22 May 2010 18:11

Iterate and count
Dears, I tried to contact someone who maintains the "Iterate" system but didn't get any feedback. I hope someone might take it up and find a fix to the following bug in iterate (which by the way is very good and I like to use it): example: (loop for i in '(1 2 3 4) collect (count i '(2 2 4 5 4 3))) OK (iter (for ... 18 May 2010 13:39