\HeaderA{randDNA}{A function to generate random DNA sequences.}{randDNA}
\begin{Description}\relax
This function generates random DNA sequences, nucleotides are 
sampled with frequency 0.25 each.
\end{Description}
\begin{Usage}
\begin{verbatim}
randDNA(n)
\end{verbatim}
\end{Usage}
\begin{Arguments}
\begin{ldescription}
\item[\code{n}] The length of the sequence desired.
\end{ldescription}
\end{Arguments}
\begin{Details}\relax
This function generates random sequences of A, C, T and G.
Real DNA is quite different, so one should not use these sequences
for much other than pedagogical purposes.
\end{Details}
\begin{Value}
A length one character vector, with \code{n} characters randomly 
chosen from A, C, T and G.
\end{Value}
\begin{Author}\relax
R. Gentleman
\end{Author}
\begin{Examples}
\begin{ExampleCode}
randDNA(100)
\end{ExampleCode}
\end{Examples}

