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2011 Aug 31
1
looping by grouping variable
Hello all, I hope something is not already posted regarding this exact problem I am trying to solve. I've read through the forums and previous postings and am still confused as to how to approach this. Basically, what I am trying to do is construct variables that utilizes an average of a variable from a grouping, or higher order, variable. For instance, in my dataset I have variables, with