witwit.coa {ade4}R Documentation

Internal Correspondence Analysis

Description

performs an Internal Correspondence Analysis.

Usage

witwit.coa(dudi, row.blocks, col.blocks, scannf = TRUE, nf = 2)
summary.witwit(object, ...)

Arguments

dudi an object of class coa
row.blocks a numeric vector indicating the row numbers for each block of rows
col.blocks a numeric vector indicating the column numbers for each block of columns
scannf a logical value indicating whether the eigenvalues bar plot should be displayed
nf if scannf FALSE, an integer indicating the number of kept axes
object an object of class witwit
... further arguments passed to or from other methods

Author(s)

Daniel Chessel chessel@biomserv.univ-lyon1.fr

References

Cazes, P., Chessel, D. and Dolédec, S. (1988) L'analyse des correspondances internes d'un tableau partitionné : son usage en hydrobiologie. Revue de Statistique Appliquée, 36, 39–54.

Examples

data(ardeche)
coa1 <- dudi.coa(ardeche$tab, scann = FALSE, nf = 4)
ww <- witwit.coa(coa1, ardeche$row.blocks, ardeche$col.blocks, scann = FALSE)
ww
s.class(ww$co, ardeche$sta.fac, clab = 1.5, cell = 0, axesell = FALSE)
s.label(ww$co, add.p = TRUE, clab = 0.75)
summary(ww)

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