\Header{data.matrix}{Data Frame to Numeric Matrix}
\keyword{array}{data.matrix}
\begin{Usage}
\begin{verbatim}
data.matrix(frame)
\end{verbatim}
\end{Usage}
\begin{Arguments}
\begin{ldescription}
\item[\texttt{frame}] a data frame whose components are either
logical vectors, factors or numeric vectors.
\end{ldescription}
\end{Arguments}
\begin{Value}
The matrix obtained by converting all the variables in a
data frame to numeric mode and then binding them together
as the columns of a matrix.
Factors and ordered factors are replaced by their codes.\end{Value}
\begin{SeeAlso}
\texttt{\Link{as.matrix}},
\texttt{\Link{codes}},
\texttt{\Link{data.frame}},
\texttt{\Link{matrix}}.\end{SeeAlso}

