Hello! Was wondering if you were able to help me? I have used the same exact code for my NHANES thesis this year with a different year's data set and have edited totPA=sum (x*x), (x*x).. etc how you have advised, however, am still not getting observations for the high level of PA. The same issue here as above! What else should I revisit in the code? Parenthesis? Change all addition equations to include a "sum" statement?  ... View more