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libfsqca

Overview

libfsqca is a cross-platform, reusable library that implements crisp- and fuzzy-set Qualitative Comparative Analysis (QCA), as described in Ragin's The Comparative Method (1987) and Redesigning Social Inquiry (2008). libfsqca and its assorted frontends are currently under active development. libfsqca is written in Python2.

• libfsqca is a library of routines related to QCA and fuzzy-set analysis. Functions include:
  • basic fuzzy operations (e.g., negation, addition, multiplication, concentration, and dilation);
  • consistency and coverage computations;
  • the "direct method" of transforming interval/ratio variables into calibrated fuzzy sets;
  • conversion of crisp/fuzzy data set into truth table;
  • truth table reduction (complex and parsimonious solutions)
• acq is A Command-line QCA, suitable for Unix shell scripting.
• Kirq is a standalone, cross-platform GUI program.

Mailing Lists

For release annoucements, please subscribe to libfsqca-annouce. This is a low-traffic, read-only mailing list.

For technical support and general discussion of the use and development of libfsqca and its frontends, please subscribe to libfsqca-discuss. This list is also for bug reports.

Development

We use Mercurial for revision control. You can examine the repositories at http://grundrisse.org/hg/. To clone a repository, simply append the project to the URL:

  $ hg clone http://grundrisse.org/hg/libfsqca
  $ hg clone http://grundrisse.org/hg/acq

The bug tracker is at http://grundrisse.org/roundup.cgi/bugs/. However, please report bugs to libfsqca-discuss.

License

libfsqca is free software. Most of the code is licensed under the AGPL3, with certain portions released under the MIT license.