ade4: scatter – R documentation

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scatter

Graphical representation of the outputs of a multivariate analysis

Description

scatter is a generic function that has methods for the classes coa, dudi, fca, acm and pco. It plots the outputs of a multivariate analysis by representing simultaneously the rows and the colums of the original table (biplot). The function biplot returns exactly the same representation.
The function screeplot represents the amount of inertia (usually variance) associated to each dimension.

Usage

scatter(x, ...)
## S3 method for class 'dudi'
biplot(x, ...)
## S3 method for class 'dudi'
screeplot(x, npcs = length(x$eig), type = c("barplot", "lines"), 
    main = deparse(substitute(x)), col = c(rep("black", x$nf),
rep("grey", npcs - x$nf)), ...)

Arguments

`x`	an object of the class `dudi` containing the outputs of a multivariate analysis
`npcs`	the number of components to be plotted
`type`	the type of plot
`main`	the title of the plot
`col`	a vector of colors
`...`	further arguments passed to or from other methods

Author(s)

Daniel Chessel
Stéphane Dray stephane.dray@univ-lyon1.fr

Examples

data(rpjdl)
rpjdl.coa <- dudi.coa(rpjdl$fau, scannf = FALSE, nf = 4)
screeplot(rpjdl.coa)
biplot(rpjdl.coa)

ade4

Analysis of Ecological Data: Exploratory and Euclidean Methods in Environmental Sciences

v1.7-16

GPL (>= 2)

Authors

Stéphane Dray <stephane.dray@univ-lyon1.fr>, Anne-Béatrice Dufour <anne-beatrice.dufour@univ-lyon1.fr>, and Jean Thioulouse <jean.thioulouse@univ-lyon1.fr>, with contributions from Thibaut Jombart, Sandrine Pavoine, Jean R. Lobry, Sébastien Ollier, Daniel Borcard, Pierre Legendre, Stéphanie Bougeard and Aurélie Siberchicot. Based on earlier work by Daniel Chessel.

Initial release