06-22-2011 11:38 PM
06-23-2011 12:53 AM
06-23-2011 02:01 AM
06-23-2011 06:16 AM
06-23-2011 12:55 PM
If your original is doing most of what you want all you actually want to do is ignore the variable then drop it from analysis:
proc summary data=mydata (drop=period) nvar;
06-24-2011 11:14 AM
Actually, since you are using period as your class variable, PROC SUMMARY will essentially ignore "period" as one of the _numeric_ variables and will issue the following:
WARNING: Variable period already exists on file WORK.MYSUMMARY.
WARNING: The duplicate variables will not be included in the output data set of the output statement number 1.