How can I set discrete numeric levels for mixture factors?
As part of a larger design, I have three factors that are mixture factors, A,B and C.A+B+C should sum to 1.A should be between 0.5 and 1.B should be between 0 and 0.5.C should be between 0 and 0.5. But as part of the physical setup of the experiment, B and C must be premixed before being added. It's difficult to do this, so I only want to use one mixture combination, a 1:1 ratio of B to C. So I on...