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QCA (version 0.3-1)

Qualitative Comparative Analysis

Description

Performs the Quine-McCluskey algorithm for Qualitative Comparative Analysis, as described in Ragin, Charles C. 1987 "The Comparative Method. Moving beyond qualitative and quantitative strategies", Berkeley: University of California Press. It currently handles about 11 conditions and one outcome. While theoretically it could handle more conditions, it requires a lot of computer resources and is memory hungry; future versions will have more functions to address this problem, as well as functions for fuzzy-set QCA. The package doesn't currently handle missing values in the data, therefore it is not yet possible to perform simplifying assumptions

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Version

Install

install.packages('QCA')

Monthly Downloads

3,227

Version

0.3-1

License

GPL version 2 or newer

Maintainer

Adrian Dusa

Last Published

December 4th, 2024

Functions in QCA (0.3-1)

QCA-package

Qualitative Comparative Analysis
solveChart

Reduce the redundant prime implicants
getRow

Get a specific row from a truth table
demoChart

Create the prime implicants chart
allExpressions

Create a matrix with all possible combinations of conditions
factorize

Factorize a QCA solution
createMatrix

Create a base matrix for the truth table
QCA-internal

Internal Functions
Ebbinghaus

Union Growth and Decline in Western Europe 1950-95
createString

Create a vector of strings containing combinations of presence/absence of conditions
Stokke

Causal mechanisms and regime effectiveness
Rokkan

Divided Working-Class Movements
truthTable

Create a truth table for crisp sets
readTosmana

Read Tosmana XML data file
prettyString

Separate a very long vector of strings on several rows
Yamasaki

The problem of contradictory simplifying assumptions
prettyTable

Print a nicely formatted matrix or truth table
Osa

Political Opportunity in Non-democracies
qmcc

Find a minimum solution in a boolean procedure, using the Quine-McCluskey algorithm