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SAS Tip of the Month
February 2014
(for SAS and WPS)

When we bring in multiple sets of data with a common ID, for example PATIENT_ID, sometimes we want to subset the data to a particular set of IDs. Rather than writing the same WHERE or IF statement multiple times there are a few techniques for writing it just once -- this allows for easy changes to the list of section as it only has to be changed once. See below for a code example:

   %macro subsel;
      where PATIENT_ID in('001','002','005')
   %mend subsel;

   proc print data=demog;
   proc print data=ae;

Hope this is useful. See you next month.

Updated February 2, 2014