\Header{real}{Real Vectors}
\alias{as.real}{real}
\alias{is.real}{real}
\keyword{classes}{real}
\begin{Description}\relax
\code{real} creates a double precision vector of the specified
length. Each element of the vector is equal to \code{0}.

\code{as.real} attempts to coerce its argument to be of real type.

\code{is.real} returns \code{TRUE} or \code{FALSE} depending on
whether its argument is of real type or not.\end{Description}
\begin{Usage}
\begin{verbatim}
real(length = 0)
as.real(x)
is.real(x)
\end{verbatim}
\end{Usage}
\begin{Note}\relax
\emph{\R{} has no single precision data type.
All real numbers are stored in double precision format}.\end{Note}

