Frequencies for first 10,000 rows of neuro variable in namcs2015 dataset : Neurologic | exam | Freq. Percent Cum. ------------+----------------------------------- 0 | 8,936 89.36 89.36 1 | 1,064 10.64 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 25 Oct 2017