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$nf)), ...)
Arguments
- x
an object of the class dudi containing the outputs of
a multivariate analysis
- npcs
the number of components to be plotted
- type
the type of plot
- main
the title of the plot
- col
a vector of colors
- ...
further arguments passed to or from other methods
Examples
data(rpjdl)
rpjdl.coa <- dudi.coa(rpjdl$fau, scannf = FALSE, nf = 4)
screeplot(rpjdl.coa)
#> Error in eval(thecall$score, envir = sys.frame(sys.nframe() + pos)): object 'rpjdl.coa' not found
biplot(rpjdl.coa)
#> Error in biplot.dudi(rpjdl.coa): object 'rpjdl.coa' not found
