GDAtools (version 2.1)

supvar: Statistics for a categorical supplementary variable

Description

From MCA results, computes statistics (weights, coordinates, contributions, test-values, variances) for a categorical supplementary variable.

Usage

supvar(resmca, var)
varsup(resmca, var)

Value

Returns a list:

weight

numeric vector of categories weights

coord

data frame of categories coordinates

cos2

data frame of categories squared cosines

var

data frame of categories within variances, variance between and within categories and variable squared correlation ratio (eta2)

typic

data frame of categories typicality test statistics

pval

data frame of categories p-values from typicality test statistics

cor

data frame of categories correlation coefficients

Arguments

resmca

object of class MCA, speMCA, csMCA, stMCA or multiMCA

var

the categorical supplementary variable. It does not need to have been used at the MCA step.

Author

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

supvars, ggadd_supvar, ggadd_supvars, textvarsup, supind

Examples

# specific MCA of Music example data set
data(Music)
junk <- c("FrenchPop.NA", "Rap.NA", "Rock.NA", "Jazz.NA", "Classical.NA")
mca <- speMCA(Music[,1:5], excl = junk)
# computes statistics for Age supplementary variable
supvar(mca,Music$Age)