This was just the relevant snippet. I assumed _N_ was the number of observations, but I guess I am wrong. What I ended up doing to hack this problem was export the residuals from Proc Reg and compute the sum of squares in Proc mean, but then I have to export that value AGAIN to another data set in order to do what I need to do, so I am looking for a way that I can do this in 1 or 2 steps. Silly question, but is there a way that I can perform arithmetic in other procedures, like the print procedure, or is user generated arithmetic only limited to a data step? This is the main source of confusion I am having, as I come from a C/C++ background so I'm not used to not being able to utilize my data in whichever function I want. Thanks
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