Frequencies for first 10,000 rows of temptake variable in nhamcsopd2010 dataset : temperature | taken | Freq. Percent Cum. ------------+----------------------------------- no | 5,526 55.26 55.26 yes | 4,474 44.74 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 28 Mar 2016