planecontrib {GDAtools}

Contributions to a plane

Description

For a given plane of a MCA, computes contributions and squared cosines of the active variables and categories and of the active individuals.

Usage

planecontrib(resmca, axes = c(1,2))

Arguments

resmca

object of class MCA, speMCA or csMCA

axes

numeric vector of length 2, specifying the axes forming the plane to describe. Default is c(1,2).

Value

A list of two lists. The first deals with variables :

ctr

vector of contributions of the active categories to the plane

cos2

vector of squared cosines of the active categories in the plane

vctr

vector of contributions of the active variables to the plane

The second deals with observations :

ctr

vector of contributions of the observations to the plane

cos2

vector of squared cosines of the observations in the plane

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

dimcontrib, tabcontrib

Examples

data(Music)
junk <- c("FrenchPop.NA","Rap.NA","Jazz.NA","Classical.NA","Rock.NA")
mca <- speMCA(Music[,1:5], excl = junk)
co <- planecontrib(mca)
co$var