I am using principal component analysis in SAS V.9.4 for the first time, and I noticed that when I output the first factor it was standardized (mean of 0, standard deviation of 1). However, the continuous variables I entered into the original procedure were not centered originally. In reading through SAS procedure guide for PROC FACTOR, I am having trouble telling whether or not I should have included NOINT in the data step (to indicate that the variables being combined were not centered already) or if PROC FACTOR standardizes the variables as a part of the behind-the-scenes programming. My concern is that the results are inaccurate (without including the NOINT data option) because the variables were not standardized before being included in the procedure but it is assumed that they are.
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