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QCA (version 0.4-2)

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 15 conditions and one outcome. Given sufficient memory and computing power, more conditions could be handled but realistically an _exact_ solution cannot be provided with acceptable speed for more than 15 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 in order to perform simplifying assumptions

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Version

Install

install.packages('QCA')

Monthly Downloads

3,227

Version

0.4-2

License

GPL version 2 or newer

Maintainer

Adrian Dusa

Last Published

December 4th, 2024

Functions in QCA (0.4-2)

createString

Create a vector of strings containing combinations of presence/absence of conditions
MI.15

Random data with 15 conditions and 1 outcome
Stokke

Causal mechanisms and regime effectiveness
Rokkan

Divided Working-Class Movements
mighty14

Random data with 14 conditions and 1 outcome
Yamasaki

The problem of contradictory simplifying assumptions
demoChart

Create the prime implicants chart
QCA-internal

Internal Functions
big10

Random data with 10 conditions and 1 outcome
lucky13

Random data with 13 conditions and 1 outcome
Ebbinghaus

Union Growth and Decline in Western Europe 1950-95
getRow

Get a specific row from a truth table
dozen12

Random data with 12 conditions and 1 outcome
QCA-package

Qualitative Comparative Analysis
allExpressions

Create a matrix with all possible combinations of conditions
prettyTable

Print a nicely formatted matrix or truth table
qmcc

Find a minimum solution in a boolean procedure, using the Quine-McCluskey algorithm
even11

Random data with 11 conditions and 1 outcome
factorize

Factorize a QCA solution
prettyString

Separate a very long vector of strings on several rows
solveChart

Reduce the redundant prime implicants
createMatrix

Create a base matrix for the truth table
Osa

Political Opportunity in Non-democracies
truthTable

Create a truth table for crisp sets
readTosmana

Read Tosmana XML data file