index-class.Rd
\name{index-class}
\docType{class}
\alias{index-class}
%% The "[" and "[<-" methods are
%% in ./Xtrct-methods.Rd and ./Subassign-methods.Rd
\title{Virtual Class "index" - Simple Class for Matrix Indices}
\description{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{\link{setClassUnion}}) of
\code{"numeric"}, \code{"logical"} and \code{"character"}.
}
\section{Objects from the Class}{Since it is a virtual Class, no objects
may be created from it.}
\seealso{
\code{\link{[-methods}}, and
%% FIXME: bug in Rdconv needs '[Matrix]' below:
\code{\link[Matrix]{Subassign-methods}}, also for examples.
}
\examples{
showClass("index")
}
\keyword{classes}