\label{Authoring_Dynamic_Plot_Curve}

The \textbf{curve} tag is where you set the data to be plotted by gnuplot.

The following parameters may be present in the \textbf{curve} tag and allow
access to most of the formatting parameters for a curve in gnuplot.


\begin{itemize}

\item color

The color of the curve on the plot. See ``Selecting Colors'' section  
\ref{Authoring_Dynamic_Plot_Color_Selection}.


\item name

If a key is present, the name of the curve will appear with a sample of its
line type.

\item linestyle

See ``Line Styles'' section \ref{Authoring_Dynamic_Plot_Linestyle} for
more information about the available line styles and their data requirements.

\item linetype

The type of line.  Current options include `solid' and `dashed'.  At this time, all dashed lines draw with line width of `1' in web output.  This parameter may not apply to all linestyles.

\item linewidth

The thickness of the line drawn by plotting engine.  This parameter may not apply to all linestyles.

\item pointtype

This parameter may not apply to all linestyles.
 
\item pointsize

This parameter may not apply to all linestyles.  The size of the points, in
pixels, present on the line.  Some point types are not affected by this
parameter.

\item  limit 

This parameter controls the pont to fill for fillled curves.

\item arrowhead

For vector plots, controls where in the vector the arrow head(s) appear

\item arrowstyle

For vector plots controls the fill style of the arrow.

\item arrowlength

For vector plots determines the distance between the vector line end and the tip
of the arrow.

\item arrowangle

For vector plots, determines the angle the arrow branches make with the 
vector line.

\item arrowbackangle

For vector plots, determines the angle the arrow lines that return to the
main line from the branches make with the arrow branches.

\end{itemize}

There are two ways of entering the information to be plotted, which are 
accessed using the subtags of \textbf{curve}, \textbf{data} 
(see ``Plotting Data Points'' section \ref{Authoring_Dynamic_Plot_Curve_Data}) 
and \textbf{function}
(see ``Plotting Functions'' section \ref{Authoring_Dynamic_Plot_Curve_Function}).