Make one or more plots to the current plot device (see setplot device).
XSPEC> plot <plot type> <plot type>
<plot type> is a keyword describing the various plots allowed. Any of the
options counts, data, or ldata can be followed by a second
option, which should be one of chisq, delchi, ratio,
residuals, or none. If one
of these second options is given, then a two-pane plot is drawn with the first
option in the upper pane and the second option in the lower. (see also iplot)