proc factex; factors x1 x2 / nlev = 3; output out=intermediate x1 nvals = (-1 0 1) x2 nvals = (-1 0 1); run; factors x3 / nlev = 2; output out=can designrep=intermediate; proc print data=can; run; proc optex data=can seed=57922; class x3; model x1 x2 x1*x2 x1*x1 x2*x2 x3; generate n=10 criterion=d method=fedorov; examine information variance; output out=des; proc print data=des; run;