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Hello, know somebody a "nice" strategy to analyze a lot of binary variables with hundred to thousands of cases. P.S. One nice example for this and something more is the configurational approach from C.Ragin http://www.nwu.edu/sociology/tools/qca/qca.html ,but i fight with the complexity of my data and the speed of the contibuted software in TCL/TK and would attempt to implement this in R ! thanks for any suggestions christian -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-....

Dear list members, I am pleased to let you know that R met with QCA - Qualitative Comparative Analysis. This package has a few functions that implement the Quine-McCluskey algorithm, adapted to social sciences by Charles Ragin (as describes in his book from 1987 "The Comparative Method"). Future versions of this package will have more functions to address the fuzzy-set minimization problems, as well. Big thanks to the r-help list members, supportive as ever, especially to Gabor Grothendieck and Martin Maech...

Does anybody know of aything that will help me do Quantitiative Comparative Analysis (QCA) and/or Fuzzy set analysis?? Or failing that Quine? ta rg Prof R Gott Durham Univesrity UK

Dear Adrian Dusa, others, I've recently started to learn R in order to use the QCA package because i think it might offer what other QCA packages don't: possibilities for quite a few conditions and large n. However, can someone tell me approx. how much RAM i need to run QCA on set of +/- 400.000 cases and +/- 15 conditions? (or differently: how much time will it take with RAM of a

...t; ta > rg > Prof R Gott > Durham Univesrity > UK There is a package called QCA which (in its first release) performs only crisp set analysis. I am currently adapting a Graphical User Interface, but the functions are nevertheless usefull. For fuzzy set analysis, please consider Charles Ragin's web site http://www.u.arizona.edu/%7Ecragin/fsQCA/index.shtml which offers a software (still not complete, though). Also to consider is a good software called Tosmana (http://www.tosmana.org/) which does multi-value QCA. I am considering writing the inclusion algorithms in the next releases o...

...ruct a truthTable, which can be passed to QCA:::eqmcc to do the Boolean minimization. The function is here: http://code.google.com/p/asrr/source/browse/trunk/R/fs_truthTable.R and the help page is: http://code.google.com/p/asrr/source/browse/trunk/man/fs_truthTable.rd and the example dataset from Ragin (2009) is here http://code.google.com/p/asrr/source/browse/trunk/data/Lipset_fs.rda Best On Wed, Mar 8, 2006 at 2:13 AM, Adrian DUSA <dusa.adrian at gmail.com> wrote: > Dear Prof. Gott, > > On Monday 06 March 2006 14:37, R Gott wrote: >> Does anybody know of aything that will...