plot_selection

           plot selected data

           cafe

           plot type

           group    - (optional) Define the data group to plot.
                      Default is the current group. Must be in
                      range [0..29].

           selection- plots selected datapoints. X/Y ranges are
                      kept. Undefined points are plot not plot.

           Apart from IDL oplot keywords following special
                      are defined:
           undefined- Plot undefined data points. Useful for
                      closer inspection.
           distinct - Plot each subgroup file with a
                      different color.
        deltacolor  - Color difference for distinct data sets.
     deltalinestyle - Increase of line styles for distinct data
                      sets. Default: 0 (no change).
          deltapsym - Increase of point symbols for distinct data
                      sets. May be positive or negative
                      integer number. Default: 0 (no change).
                      If psym exceeds -7..7 it will be set at 0 (no
                      symbol). Therefore it is recomended to
                      plot data sets with lines with a negative
                      deltapsym (to decrease and restart from 0).
        selectcolor - Color for selected data points.
        undefcolor  - Color for undefined data points.

           None.

           > plot, data+selection
                -> plot data plus their selected datapoints.

           $Id: cafe_plot_selection.pro,v 1.15 2004/07/30 17:17:26 goehler Exp $

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