Provides a screeplot and biplot for (robust) compositional principal components analysis.
Usage
# S3 method for pcaCoDa
plot(x, y, ..., which = 1, choices = 1:2)
Value
The robust compositional screeplot.
Arguments
x
object of class ‘pcaCoDa’
y
...
...
...
which
an integer between 1 and 3. Produces a screeplot (1), or a biplot using stats biplot.prcomp function (2), or a biplot using ggfortify's autoplot function (3).
choices
principal components to plot by number
Author
M. Templ, K. Hron
References
Filzmoser, P., Hron, K., Reimann, C. (2009) Principal Component Analysis for
Compositional Data with Outliers. Environmetrics, 20 (6),
621--632.