scatter: Graphical representation of the outputs of a multivariate...

In ade4: Analysis of Ecological Data: Exploratory and Euclidean Methods in Environmental Sciences

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 [e-mail]

See Also

s.arrow, s.chull, s.class, s.corcircle, s.distri, s.label, s.match, s.traject, s.value, add.scatter

Examples

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

ade4 documentation built on Feb. 16, 2023, 7:58 p.m.