Performing PCA on numeric values in SAS

Question

I am performing PCA on the numeric columns present in my dataset.These numeric columns are in the same range so still do i need to standardize( Using PROC STANDARD) those columns before performing PCA on them?

Answer 1

You do not need to standardize them before running proc princomp. Add the std option to produce standardized principal component scores.

proc princomp data=mydata out=scores std;
    var var1 var2 var3;
run;