Hello - I am currently using PCA on 60+ descriptors of chemical elements to reduce the dimensionality and convert "element" from a categorical variable to a continuous variable. However, I cannot find a simple way to use a set of factors with lots of required level combinations. My two thoughts are the "set covariate factors" or the disallowed combinations script. However covariate runs A) has a weird suggestion of the number of runs equaling the number of levels of my PC's, even without me checking the "Include all selected covariate rows in the design" and 
seems antithetical to the concept of PCA, which generates uncorrelated components. The disallowed combinations script I assume would work (haven't explored it yet), but I have never played with JSL and so I wanted to see if anyone had any suggestions before I go down that road.
Thanks so much!
P.S. I also included the (unfinished) table and a separate one for the PC's that I'm using to generate the DoE if that helps.
