Denoting Factors in Experimental Design
When you display or print a design in the Experimental Design module, you can choose to denote the factors by numbers, by letters, or by names. By default, factors are named by consecutive letters (A, B, C, ...). The options described here are available in the Design of Experiment with Two-Level Factors dialog, the Design of a Screening (Plackett-Burman) Experiment dialog, the Design of an Experiment with Three-Level Factors dialog, the Design of an Experiment with Two- and Three-Level Factors dialog, the Design of a Mixture Experiment dialog, the Optimal Design Result: Mixture dialog, the Optimal Design Result: Response Surface dialog, and the Design of a Central Composite (Response Surface) Experiment dialog.
By numbers
When you select this option button, the factors are denoted by numbers; that is, consecutive factors are labeled as F1, F2, ..., Fn.
By letters
When you select this option button, the factors are denoted by letters; that is, consecutive factors are labeled as A, B, C, and so on.
By names
When you select this option button, the factors are denoted by their names, as specified via the button Change factor names, values, etc. in the respective results dialog.