Frequencies for first 10,000 rows of glucose variable in nhamcsed2008 dataset : glucose | Freq. Percent Cum. ------------+----------------------------------- no | 7,519 75.19 75.19 yes | 2,481 24.81 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 28 Mar 2016