

    \filetitle{vline}{Add vertical line with text caption at the specified position}{grfun/vline}

	\paragraph{Syntax}
 
 \begin{verbatim}
 [LN,CP] = grfun.vline(AX,POSITION,...)
 [LN,CP] = grfun.vline(POSITION,...)
 \end{verbatim}
 \paragraph{Input arguments}
 
 \begin{itemize}
 \item
   \texttt{AX} {[} numeric {]} - Handle to an axes object in which the
   vline will be placed.
 \item
   \texttt{POSITION} {[} numeric {]} - Horizontal position on the x-axis
   at which the vline will be placed; in tseries graphs this is supposed
   to be a date.
 \end{itemize}
 \paragraph{Output arguments}
 
 \begin{itemize}
 \item
   \texttt{LN} {[} numeric {]} - Handle to the vline(s) plotted (line
   objects).
 \item
   \texttt{CP} {[} numeric {]} - Handle to the caption(s) created (text
   objects).
 \end{itemize}
 \paragraph{Options}
 
 \begin{itemize}
 \item
   \texttt{'caption='} {[} char {]} - Annotate the vline with this text
   string.
 \item
   \texttt{'excludeFromLegend='} {[} \emph{\texttt{true}} \textbar{}
   \texttt{false} {]} - Exclude the vline from legend.
 \item
   \texttt{'hPosition='} {[} \texttt{'center'} \textbar{} \texttt{'left'}
   \textbar{} \emph{\texttt{'right'}} {]} - Horizontal position of the
   caption.
 \item
   \texttt{'vPosition='} {[} \texttt{'bottom'} \textbar{}
   \texttt{'middle'} \textbar{} \emph{\texttt{'top'}} \textbar{} numeric
   {]} - Vertical position of the caption.
 \item
   \texttt{'timePosition='} {[} \texttt{'after'} \textbar{}
   \texttt{'before'} \textbar{} \texttt{'middle'} {]} - Placement of the
   vertical line on the time axis: in the middle of the specified period,
   immediately before it (between the specified period and the previous
   one), or immediately after it (between the specified period and the
   next one).
 \end{itemize}
 \paragraph{Description}
 
 \paragraph{Example}


