I am designing an experiment using Orthogonal array. I have managed to do it in R as well. However, I missed one functionality that is restricting the randomization. That means, I want to randomize my runs (experiments) partly. For instance if I want to design an experiment with three factors and two levels, some of the randomized runs could be given as follows:
- A1 B2 C1
- A2 B1 C2
A3 B2 C2 I want to randomize it as
A1 B1 C1
- A1 B1 C2
- A2 B2 C1
I want to restrict only factor A and B. Factor C could be randomized.
Can anyone give me a hint on how to do this?