Here are answers to some common questions about ade4 (more to come soon).
Installation
How to install the current version of ade4?
The easiest way to install ade4 is to use
install.packages("ade4") in your R session.
How to install the development version of ade4?
To install the development version from github:
remotes::install_github("adeverse/ade4")How do I know which ade4 version I’m using?
In your R session, type:
packageDescription("ade4", field="Version")Graphics
What is adegraphics?
The package adegraphics provides a complete
reimplementation of graphical functionalities of ade4. It
is based on lattice and provides a convenient way to manage
graphics as objects. Moreover, it offers much more flexibility than
ade4 to customize your plots.
How to load adegraphics?
As adegraphics provides a reimplementation of
ade4 graphical functions, many functions have the same name
in the two packages. To be sure to use adegraphics
functions, adegraphics should be loaded
after ade4:
An alternative it to explicitly specify the package in the call using
the :: operator:
adegraphics::s.label()Simple Analysis
How to obtain coordinates for individuals?
In simple analysis (e.g., dudi.pca), scores for
individuals are stored in $li element of the returned
object
How to obtain coordinates for variables?
In simple analysis (e.g., dudi.pca), scores for
variables are stored in $co element of the returned
object
What are the $l1 and $c1 elements of a
dudi ?
In simple analysis (e.g., dudi.pca), the
$c1 element contains the principal axes (aka “loadings” of
the variables) and the $l1 element contains the principal
components. The norm of these two elements is equal to 1, which makes
them useful for drawing biplots (for example).