
<tr><td width="150"><a href="html/plot_arrow.html">plot_arrow</a></td><td width="300">draw an arrow</td></tr>
<tr><td width="150"><a href="html/plot_box.html">plot_box</a></td><td width="300">draw a box</td></tr>
<tr><td width="150"><a href="html/plot_circle.html">plot_circle</a></td><td width="300">draw a circle</td></tr>
<tr><td width="150"><a href="html/plot_ellipse.html">plot_ellipse</a></td><td width="300">draw an ellipse</td></tr>
<tr><td width="150"><a href="html/plot_homline.html">plot_homline</a><