*******************************************************************************
****************  CESR BPM DAQ online analysis utilities  *********************
*******************************************************************************
BPMPLOTTER: This program may be used for plotting beam positions as a function of turn or
average number. The source code is in USER$DISK:[CESR.PALMER.TS101.BPM.DEV]
The idea is to do this for 1 e+ AND 1 e- bunch (i.e. these two and only these two) need
to have been selected when the measurement was made. One could extent this capability
by allowing the user to choose from the bunches that were in the measurement.

It reads plot settings from bpm_plot.dat; below is an example of bpm_plot.dat:
-1000.  1000.  -1000.5 1000.5  -1000.  1000.    0    0    0
-2000.  2000.  -2000.5 2000.5  -2000.  2000.    0    0    0
0. 80000. 0. -80000.
1
1 

The values correspond to:
ymn1,ymx1,ymn2,ymx2,ymn3,ymx3,ih1,ih2,ih3   <---- vertical scales for top, middle and bottom
                                                  plots (left side of window), followed by
                                                  maximum scale for top, middle and bottom
                                                  histograms (right side of window). This 
                                                  window for horizontal positions (top plot
                                                  for one species, middle for the other and
                                                  bottom for the difference).
ymn4,ymx4,ymn5,ymx5,ymn6,ymx6,ih4,ih5,ih6   <---- vertical scales for top, middle and bottom
                                                  plots (left side of window), followed by
                                                  maximum scale for top, middle and bottom
                                                  histograms (right side of window). This 
                                                  window for vertical positions (top plot
                                                  for one species, middle for the other and
                                                  bottom for the difference).
ymn7,ymx7,ymn8,ymx8                         <---- vertical scales for top and bottom plots.
                                                  This window for sum of button signals.
ep     <--- if 1, data in data file start with electrons and will be plotted at the top
            if ep<>1, data file starts with positrons and they will be plotted at the top
ffd    <--- if 1, plot on Xwindow; if 2, plot to gif files; if 3, plot to PS files.

Assuming @[CESR.PALMER.TS101.COM]init was typed earlier, execute BPMPLOTTER in the following
way:
bpmplotter <data_file_name>
where <data_file_name> is the name of the datafile to read in. This file