modif.rate {GDAtools} | R Documentation |
Benzecri's modified rates of variance
Description
Computes Benzecri's modified rates of variance of a multiple correspondence analysis.
Usage
modif.rate(resmca)
Arguments
resmca |
object of class |
Details
As MCA clouds often have a high dimensionality, the variance rates of the first principle axes may be quite low, which makes them hard to interpret. Benzecri (1992, p.412) proposed to use modified rates to better appreciate the relative importance of the principal axes.
Value
Returns a list of two data frames.
The first one is called raw
and has 3 variables:
eigen |
eigen values |
rate |
rates |
cum.rate |
cumulative rates |
The second one is called modif
and has 2 variables:
mrate |
modified rates |
cum.mrate |
cumulative modified rates |
Author(s)
Nicolas Robette
References
Benzecri J.P., Correspondence analysis handbook, New-York: Dekker (1992).
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
Examples
# MCA of Music' example data set
data(Music)
mca <- speMCA(Music[,1:5])
# modified rates of variance
modif.rate(mca)