inertia.dudi {ade4}R Documentation

Statistics of inertia in a one-table analysis

Description

Prints of the statistics of inertia in a one-table analysis

Usage

inertia.dudi(dudi, row.inertia = FALSE, col.inertia = FALSE)

Arguments

dudi a duality diagram, object of class dudi
row.inertia if TRUE, returns the statistics of the decomposition of inertia for the rows
col.inertia if TRUE, returns the statistics of the decomposition of inertia for the columns

Details

Contributions are printed in 1/10000 and the sign is the sign of the coordinate

Value

a list containing :
TOT repartition of the total inertia between axes
row.abs absolute contributions of the decomposition of inertia for the rows
row.rel relative contributions of the decomposition of inertia for the rows
row.cum cumulative relative contributions of the decomposition of inertia for the rows
col.abs absolute contributions of the decomposition of inertia for the columns
col.rel relative contributions of the decomposition of inertia for the columns
col.cum cumulative relative contributions of the decomposition of inertia for the columns

Author(s)

Daniel Chessel
Anne B Dufour dufour@biomserv.univ-lyon1.fr

References

Lebart, L., Morineau, A. and Tabart, N. (1977) Techniques de la description statistique, méthodes et logiciels pour la description des grands tableaux, Dunod, Paris, 61–62.

Volle, M. (1981) Analyse des données, Economica, Paris, 89–90 and 118

Lebart, L., Morineau, L. and Warwick, K.M. (1984) Multivariate descriptive analysis: correspondence and related techniques for large matrices, John Wiley and Sons, New York.

Greenacre, M. (1984) Theory and applications of correspondence analysis, Academic Press, London, 66.

Rouanet, H. and Le Roux, B. (1993) Analyse des données multidimensionnelles, Dunod, Paris, 143–144.

Tenenhaus, M. (1994) Méthodes statistiques en gestion, Dunod, Paris, p. 160, 161, 166, 204.

Lebart, L., Morineau, A. and Piron, M. (1995) Statistique exploratoire multidimensionnelle, Dunod, Paris, p. 56,95-96.

Examples

data(housetasks)
coa1 <- dudi.coa(housetasks, scann = FALSE)
inertia.dudi(coa1, col = TRUE, row = FALSE)$col.rel

Worked out examples


> library(ade4)
> ### Name: inertia.dudi
> ### Title: Statistics of inertia in a one-table analysis
> ### Aliases: inertia.dudi
> ### Keywords: multivariate
> 
> ### ** Examples
> 
> data(housetasks)
> coa1 <- dudi.coa(housetasks, scann = FALSE)
> inertia.dudi(coa1, col = TRUE, row = FALSE)$col.rel
            Comp1 Comp2 con.tra
Wife         8019 -1524    2700
Alternating    48 -1051    1057
Husband     -7720 -2075    3421
Jointly      -207  9773    2823
> 
> 
> 
>
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