Frequencies for first 10,000 rows of latcar variable in nsrd dataset :

   Latitude |
   Cardinal |
Direction ( |
   N or S ) |      Freq.     Percent        Cum.
------------+-----------------------------------
          N |     10,000      100.00      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 15 Jun 2016