<pre>
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help for rtab
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Reverse tabulate
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<p>
 rtab  varname [if] [in] [, SEParator(int 0) *]
<p>
Description
-----------
<p>
rtab tabulates values from highest to lowest while the
     cumulative percent begins with the lowest value.  Thus
     the cumulative percents can be interpreted as 
     percentiles.
<p>
Example
-------
<p>
 . rtab write
 . rtab write, sep(10) nolabel
<p>
 Acknowledgements
 ----------------
 
 Thanks to Nick Cox for helpful suggestions to improve the
      program.

<p>
Author
------
<p>
      Philip B. Ender
      Statistical Computing and Consulting
      UCLA, Office of Academic Computing
      enderatucla.edu 
<p>
</pre>