burt {GDAtools}

Burt table

Description

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)

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.

Value

Returns a square matrix. Its dimension is equal to the total number of categories in the data frame.

Author(s)

Nicolas Robette

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).

See Also

dichotom

Examples

## Burt table of variables in columns 1 to 5
## in the Music example data set
data(Music)
burt(Music[,1:5])