Computes a Burt table from a data frame composed of categorical variables.
Usage
burt(data)
Arguments
data
data frame with n rows (individuals) and p columns (categorical variables)
Value
Returns a square matrix. Its dimension is equal to the total number of categories in the data frame.
Details
A Burt table is a symmetric table that is used in correspondence analysis.
It shows the frequencies for all combinations of categories of pairs of variables.
References
Le Roux B. and Rouanet H., Multiple Correspondence Analysis, SAGE, Series: Quantitative Applications in the Social Sciences, Volume 163, CA:Thousand Oaks (2010).
Le Roux B. and Rouanet H., Geometric Data Analysis: From Correspondence Analysis to Stuctured Data Analysis, Kluwer Academic Publishers, Dordrecht (June 2004).