Randomization
Randomize Row Order Select to randomize the order of the rows in the design.
Restricted Factors Optionally, specify a vector (either numeric or character) naming some factors (columns) in the design which shouldn't be scrambled. This must be enclosed in quotation marks. In the dialog on the Orthogonal Array topic page, the example is changed so that factor A is restricted, while factors B and C are randomized. The resulting data set is also shown.