[R-pkgs] version 0.3 of QCA

Adrian Dusa dusa.adrian at gmail.com
Tue Jan 23 12:28:08 CET 2007

Dear list members,

A new version of the QCA package is now on CRAN.
The QCA package implements the Quine-McCluskey algorithm for boolean 
minimizations, according to the Qualitative Comparative Analysis.

Along with the additional improvements in version 0.3-1 (soon to be released 
on CRAN), this code is about 100 times faster than the previous "major" 
release (0.2-6). It can now reasonably work with 11 binary variables, finding 
a complete (and exact) solution in less than 2 minutes.

This dramatic increase in speed is due to using a mathematical reduction 
instead of an algorithmic one. This approach openes the way for _exact_ 
multi-value minimizations, and an even better (and faster) approach is 
searched for the future versions.


Adrian Dusa
Romanian Social Data Archive
1, Schitu Magureanu Bd
050025 Bucharest sector 5
Tel./Fax: +40 21 3126618 \
          +40 21 3120210 / int.101

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