

    \filetitle{zeroline}{Add zero line if Y-axis limits include zero}{grfun/zeroline}

	\paragraph{Syntax}

\begin{verbatim}
Ln = zeroline(...)
Ln = zeroline(H,...)
\end{verbatim}

\paragraph{Input arguments}

\begin{itemize}
\itemsep1pt\parskip0pt\parsep0pt
\item
  \texttt{H} {[} numeric {]} - Handle to an axes object (graph) or to a
  figure window in which the the line will be added; if not specified
  the line will be added to the current axes.
\end{itemize}

\paragraph{Output arguments}

\begin{itemize}
\itemsep1pt\parskip0pt\parsep0pt
\item
  \texttt{Ln} {[} numeric {]} - Handle to the line ploted (line object).
\end{itemize}

\paragraph{Options}

Any options valid for the standard \texttt{plot} function.

\paragraph{Description}

\paragraph{Example}


