Frequencies for first 10,000 rows of othrad variable in nhamcsopd1992 dataset : Other | radiology | Freq. Percent Cum. ------------+----------------------------------- 0 | 9,254 92.54 92.54 1 | 746 7.46 100.00 ------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 28 Mar 2016