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QCA (version 0.5-1)

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. In the classical approach it currently handles about 15 conditions and one outcome, but since version 0.4-5 the package has an enhanced, faster function that obtains the same exact solutions with a substantially lower memory consumption, and it handles even more causal conditions. The next versions of this algorithm will be oriented towards multi-value and fuzzy-set functions. Also, in the near future the current functions will deal with missing values in the data

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Version

Install

install.packages('QCA')

Monthly Downloads

2,345

Version

0.5-1

License

GPL version 2 or newer

Maintainer

Adrian Dusa

Last Published

December 4th, 2024

Functions in QCA (0.5-1)

big10

Random data with 10 conditions and 1 outcome
Ebbinghaus

Union Growth and Decline in Western Europe 1950-95
getRow

Get a specific row from a truth table
prettyString

Separate a very long vector of strings on several rows
Rokkan

Divided Working-Class Movements
createMatrix

Create a base matrix for the truth table
qmcc

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

Internal Functions
lucky13

Random data with 13 conditions and 1 outcome
allExpressions

Create a matrix with all possible combinations of conditions
mighty14

Random data with 14 conditions and 1 outcome
findPrimes

Find all possible prime implicants of one or several combinations of causal conditions
even11

Random data with 11 conditions and 1 outcome
MI.15

Random data with 15 conditions and 1 outcome
factorize

Factorize a QCA solution
findSubsets

Find all possible subsets of a given prime implicant
dozen12

Random data with 12 conditions and 1 outcome
createString

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

Enhanced Quine-McCluskey algorithm
solveChart

Reduce the redundant prime implicants
demoChart

Create the prime implicants chart
readTosmana

Read Tosmana XML data file
Osa

Political Opportunity in Non-democracies
truthTable

Truth table
Yamasaki

The problem of contradictory simplifying assumptions
Stokke

Causal mechanisms and regime effectiveness
prettyTable

Print a nicely formatted matrix or truth table
QCA-package

Qualitative Comparative Analysis