Design Of Experiments, Response Surface, Spline, Box Behnken, Central Composite Design.
the design is randomized. In this simple piece of code above, I specified the following: n0=3 meaning three center points Specify three protein levels starting with 13 ± 2 apart Specify three starch levels starting with 13.5 ± 0.5 apart Specify three fiber levels starting with 2.75 ± 0.65 apart