Frequencies for first 10,000 rows of anyimage variable in nhamcsopd2007 dataset : any imaging | Freq. Percent Cum. ------------+----------------------------------- no | 8,266 82.66 82.66 yes | 1,734 17.34 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 28 Mar 2016