Plotting Symbols

The simplest form of plotting is to draw symbols (termed markers) at a set of points. This is performed by astMarkastMark, which is supplied with a set of physical coordinates at which to place the markers:


\begin{terminalv}
...

Here, NMARK specifies how many markers to plot and NCOORD specifies how many coordinates are being supplied for each point.[*] The array “in” supplies the coordinates and the integer “type” specifies which type of marker to plot.