Offers several functions for Configural Frequencies Analysis (CFA), which is a useful statistical tool for the analysis of multiway contingency tables. CFA was introduced by G. A. Lienert as 'Konfigurations Frequenz Analyse - KFA'. Lienert, G. A. (1971). Die Konfigurationsfrequenzanalyse: I. Ein neuer Weg zu Typen und Syndromen. Zeitschrift für Klinische Psychologie und Psychotherapie, 19(2), 99–115.
Changes in Version 1.5.4-3
o introduced sequential alpha correction according to Bonferroni-Holm in summary function summary.CFA()
o fixed internal issue regarding the argument 'form' when defining a designmatrix
Changes in Version 1.5.3
o fixed some minor internal issues regarding the argument 'form' in main function 'CFA()' to maintain downward compatibility with earlier versions of confreq.
Changes in Version 1.5.0
o added the arguments 'blank' and 'cova' to extend the function CFA() introducing covariate analysis.
o added function 'dat2cov'.
o extended the argument 'blank' as a convenient option to perform functional CFA.
Changes in Version 1.4.1
o fixed some typing errors in descriptions for functions.
Changes in Version 1.4
o added import of functions from default packages, as required by the new CRAN-check.
o added the argument 'showall' in summary function for objects of class c("CFA","list").
o changed the numerical precision in calculation of the binomial test to avoid '-Inf' of 'Inf' results Under some data conditions.
o added the function expected_margin_cfa() for calculating expected counts based on margins with sparse tables.
o added the arguments 'method' and 'blank' to extend the function CFA() when using functional CFA with sparse tables.
Changes in Version 1.3-1
o added the Type index (b) for functional CFA in the summary method for object returned by function CFA().
o added a sorting option in summary method for object returned by function CFA().
o added information on function call in result of function CFA() and summary method.
o changed the internal function 'binomial_test_cfa' to avoid NaN 'values' for the (exact) binomial test under some sparse data situations.
Changes in Version 1.3
o added Information Theoretic Criteria (AIC, BIC) to the output of the main function CFA.
o extended the argument 'form' in main function CFA.
o added another data example (Lienert1978) used in the textbook by Mark Stemmler.
o added the function 'S2CFA' for two-sample-CFA and the respective summary S3 method for the result objects of class 'S2CFA'.
o due to numerical challenges in function 'S2CFA' when calculating factorials with big numbers, the package 'confreq' now has a depends on the package 'gmp'.
Changes in Version 1.2
o added another data example (newborns) taken from the textbook by Mark Stemmler.
o added the Likelihood Ratio Chi-square statistic.
o added a summary S3 method for the result objects of class 'CFA'.
Changes in Version 1.1
o fixed a bug in function dat2fre() .