Disallowed Combinations not working
Hi, I am trying to make disallowed combinations in my custom design.I have a factor with two categorical levels: No ChCl and ChCl and a factor with three ChCl molar ratio (categorical): 0, 1 and 2 I want to make a Disallowed Combinations where 'No ChCl' and a molar ratio of 0 cannot be made. ChCl== "No ChCl" & Molar ratio ChCl== '0' But the design still makes a combination of No ChCl and 0. What ...