Frequencies for first 10,000 rows of drg1ing4 variable in nhamcsopd2005 dataset : ingredient code #4 for medication #1 | Freq. Percent Cum. -------------------------------------+----------------------------------- magnesium antacids | 1 0.01 0.01 oxyquinolone | 1 0.01 0.02 petrolatum | 10 0.10 0.12 phenylalanine | 1 0.01 0.13 potassium ion | 3 0.03 0.16 riboflavin | 2 0.02 0.18 sodium sulfate | 2 0.02 0.20 soybean oil | 5 0.05 0.25 sucrose | 1 0.01 0.26 thiamine | 270 2.70 2.96 vitamin a | 1 0.01 2.97 vitamin c | 1 0.01 2.98 vitamin e | 4 0.04 3.02 zinc topical agents, external use | 3 0.03 3.05 aloe | 1 0.01 3.06 codeine phosphate | 1 0.01 3.07 dextroamphetamine sulfate | 27 0.27 3.34 hydrocortisone acetate | 3 0.03 3.37 neomycin sulfate | 1 0.01 3.38 woolwax alcohol | 2 0.02 3.40 filamentous hemagglutinin | 34 0.34 3.74 potassium | 2 0.02 3.76 . | 9,624 96.24 100.00 -------------------------------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 28 Mar 2016