\HeaderA{index-class}{Virtual Class "index" - Simple Class for Matrix Indices}{index.Rdash.class}
\keyword{classes}{index-class}
\begin{Description}\relax
The class \code{"index"} is a virtual class used for
indices (in signatures) for matrix indexing and sub-assignment of
\pkg{"Matrix"} matrices.

In fact, it is currently implemented as a simple class union
(\code{\LinkA{setClassUnion}{setClassUnion}}) of
\code{"numeric"},  \code{"logical"} and \code{"character"}.
\end{Description}
\begin{Section}{Objects from the Class}
Since it is a virtual Class, no objects
may be created from it.
\end{Section}
\begin{SeeAlso}\relax
\code{\LinkA{[-methods}{[.Rdash.methods}}, and
\code{\LinkA{Subassign-methods}{Subassign.Rdash.methods}}, also for examples.
\end{SeeAlso}
\begin{Examples}
\begin{ExampleCode}
showClass("index")
\end{ExampleCode}
\end{Examples}

