Produces a biplot from an object (derived from) Pcaclass
.
1 2 
x 
an object of class (derived from) 
choices 
length 2 vector specifying the components to plot. Only the default is a biplot in the strict sense. 
scale 
The variables are scaled by 
... 
optional arguments to be passed to the internal graphical functions. 
a plot is produced on the current graphics device.
signature(x = Pca)
: Plot a biplot, i.e. represent both
the observations and variables of a matrix of multivariate data on the same
plot. See also biplot.princomp
.
Gabriel, K. R. (1971). The biplot graphical display of matrices with applications to principal component analysis. Biometrika, 58, 453–467.
Pcaclass
,
PcaClassic
,
PcaRobustclass
.
1 2  require(graphics)
biplot(PcaClassic(USArrests, k=2))

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