\section{DAWSON Dawson Integral Function}

\subsection{Usage}

Computes the dawson function for real arguments.  The \verb|dawson|
function takes only a single argument
\begin{verbatim}
  y = dawson(x)
\end{verbatim}
where \verb|x| is either a \verb|float| or \verb|double| array.  The output
vector \verb|y| is the same size (and type) as \verb|x|.
\subsection{Function Internals}

The dawson function is defined as
\[
  \mathrm{dawson}(x) = e^{-x^2} \int_{0}^{x} e^{t^2} \, dt
\]
\subsection{Example}

Here is a plot of the dawson function over the range \verb|[-5,5]|.
\begin{verbatim}
--> x = linspace(-5,5);
--> y = dawson(x);
--> plot(x,y); xlabel('x'); ylabel('dawson(x)');

\end{verbatim}
which results in the following plot.


\centerline{\includegraphics[width=8cm]{dawson1}}

