

    \filetitle{vline}{Add vertical line to graph}{report/vline}

	\paragraph{Syntax}
 
 \begin{verbatim}
 P.vline(CAP,DATE,...)
 \end{verbatim}
 \paragraph{Input arguments}
 
 \begin{itemize}
 \item
   \texttt{P} {[} struct {]} - Report object created by the
   \href{report/new}{\texttt{report.new}} function.
 \item
   \texttt{CAP} {[} char {]} - Caption used to annotate the vertical
   line.
 \item
   \texttt{DATE} {[} numeric {]} - Date at which the vertical line will
   be plotted.
 \end{itemize}
 \paragraph{Options}
 
 \begin{itemize}
 \item
   \texttt{'hPosition='} {[} \texttt{'bottom'} \textbar{}
   \texttt{'middle'} \textbar{} \emph{\texttt{'top'}} {]} - (Inheritable
   from parent objects) Horizontal position of the caption.
 \item
   \texttt{'vPosition='} {[} \texttt{'centre'} \textbar{} \texttt{'left'}
   \textbar{} \emph{\texttt{'right'}} {]} - (Inheritable from parent
   objects) Vertical position of the caption relative to the line.
 \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{Generic options}
 
 See help on \href{report/Contents}{generic options} in report objects.
 
 \paragraph{Description}
 
 \paragraph{Example}


