Frequencies for first 10,000 rows of drg2ing4 variable in nhamcsed2003 dataset :

  ingredient code #4 for medication |
                                 #2 |      Freq.     Percent        Cum.
------------------------------------+-----------------------------------
                 magnesium antacids |          2        0.02        0.02
                      potassium ion |          9        0.09        0.11
                         riboflavin |          1        0.01        0.12
                     sodium sulfate |          1        0.01        0.13
                           thiamine |          4        0.04        0.17
  zinc topical agents, external use |          1        0.01        0.18
                hyoscyamine sulfate |         10        0.10        0.28
                diphenhydramine hcl |          1        0.01        0.29
                   neomycin sulfate |          2        0.02        0.31
                                  . |      9,969       99.69      100.00
------------------------------------+-----------------------------------
                              Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 28 Mar 2016