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1.1       matthew     1: \label{Authoring_Dynamic_Plot_Gnuplot}
                      2: 
1.6       lira        3: \index{gnuplot}\index{plot}\index{dynamic plot}
                      4: The \textbf{gnuplot} LON-CAPA tag allows an author to design a plot which is created
1.1       matthew     5: when it is viewed.  This is intended for use in homework problems
                      6: where each student needs to see a distinct plot.  It can be used in
1.6       lira        7: conjunction with a \textbf{script} tag to generate curve data for random plots.
                      8: If you are using
                      9: static data a dynamically generated plot is not appropriate because of
                     10: the overhead associated with generating the plot. In that case, use a
                     11: picture (see \ref{Authoring_Adding_Pictures}).
                     12: 
                     13: The easiset way to create a template for a gnuplot tag is to use the colorful 
                     14: problem editor, and select \textbf{GnuPlot} from the \textbf{Insert} dropdown menu. 
                     15: Then the boxes may be filled with the assistance of this documentation. By default, only
                     16: the parent \textbf{gnuplot} tag and the child \textbf{curve} tag are created by 
                     17: default when the plot is inserted with the colorful editor. Other tags can be 
                     18: added to decorate and polish your plot using the \textbf{Insert:} dropdown 
                     19: from the colorful editor.
1.1       matthew    20: 
1.6       lira       21: The following \textbf{gnuplot} parameters may be set:
1.1       matthew    22: 
                     23: \begin{itemize}
                     24: \item \texttt{brief description of the plot} 
1.6       lira       25: This text is used as the \texttt{alt} value of the \texttt{img} tag 
                     26: used to display the plot on a web page.
1.1       matthew    27: 
                     28: \item \texttt{background color of image (xffffff)}
1.6       lira       29: See the color selection section \ref{Authoring_Dynamic_Plot_Color_Selection}
1.1       matthew    30: for help on specifying colors.
                     31: 
                     32: \item \texttt{foreground color of image (x000000)} 
1.6       lira       33: See the color selection  section \ref{Authoring_Dynamic_Plot_Color_Selection}
1.1       matthew    34: for help on specifying colors.
                     35: 
                     36: \item \texttt{height of image (pixels)}
                     37: 
                     38: \item \texttt{width of image (pixels)}
                     39: 
                     40: \item \texttt{Size of font to use} ``small'', ``medium'', or ``large''.  
                     41: The font used for any text on the plot is set with this tag.
                     42: 
                     43: \item \texttt{Transparent image} ``Yes'' or ``No''.  
                     44: If the image is transparent the background color will be ignored.
                     45: 
                     46: \item \texttt{Display grid} ``Yes'' or ``No''.  
                     47: 
1.6       lira       48: \item \texttt{Number of samples for non-data plots}  If a \textbf{function} tag 
                     49: (see section \ref{Authoring_Dynamic_Plot_Curve_Function}) is used to specify the
                     50: \textbf{curve} (see section \ref{Authoring_Dynamic_Plot_Curve}), this indicates the number
1.1       matthew    51: of sample points to use.
                     52: 
                     53: \item \texttt{Draw border around plot} ``Yes'' or ``No''
                     54: 
                     55: \item \texttt{alignment for image in html} ``Left'', ``Center'', or ``Right''.
                     56: This is the value used for the \texttt{align} parameter in the \texttt{img} 
                     57: tag which embeds the plot in the problem.
                     58: 
1.3       matthew    59: \item \texttt{Width of plot when printed (mm)} The width in mm of the plot when
                     60: it is printed.  The default is approximately one half of a U.S. letter size 
                     61: page, 93 mm.
                     62: 
                     63: \item \texttt{Font size to use in TeX output (pts)} The size in points of text
                     64: on the graph when it is printed out.
                     65: 
1.4       vandui11   66: \item \texttt{Plot type} ``Cartesian'' or ``Polar''.  
                     67: 
                     68: \item \texttt{margin width (pts)} The left, right, top, or bottom margin width
                     69: measured in points.
                     70: 
                     71: \item \texttt{Size of major tic marks} The size of the larger tic marks on the
                     72: plot border or axes, measured in graph units.
                     73: 
                     74: \item \texttt{Size of minor tic marks} The size of the smaller tic marks on the
                     75: plot border or axes, measured in graph units.
                     76: 
1.1       matthew    77: \end{itemize}
                     78: 
1.7     ! lira       79: The parent \texttt{gnuplot} tag allows use of the following child tags 
1.6       lira       80: (only the \textbf{curve} tag is added automatically when inserting with the colorful
                     81: editor):
1.1       matthew    82: 
                     83: \begin{itemize}
1.6       lira       84: \item \textbf{curve} (see section \ref{Authoring_Dynamic_Plot_Curve})
                     85: \item \textbf{title}, \textbf{xlabel}, and \textbf{ylabel} (see section 
                     86: \ref{Authoring_Dynamic_Plot_Title_X_Y_Label})
                     87: \item \textbf{key}   (see section \ref{Authoring_Dynamic_Plot_Key})
                     88: \item \textbf{label} (see section \ref{Authoring_Dynamic_Plot_Label})
                     89: \item \textbf{axes}  (see section \ref{Authoring_Dynamic_Plot_Axes})
                     90: \item \textbf{tics}  (see section \ref{Authoring_Dynamic_Plot_Tics})
1.1       matthew    91: \end{itemize}
                     92: