Chapter Contents |
Previous |
Next |
The PLAN Procedure |
The procedure generates each treatment simultaneously with the lowest (that is, the most nested) factor in the last FACTORS statement. The m value for each treatment must be at least as large as the m for the most-nested factor.
The following statements give an example of using both a FACTORS and a TREATMENTS statement. First the FACTORS statement sets up the rows and columns of a 3 ×3 square (factors r and c). Then, the TREATMENTS statement augments the square with two cyclic treatments. The resulting design is a 3 ×3 Graeco-Latin square, a type of design useful in main-effects factorial experiments.
proc plan; factors r=3 ordered c=3 ordered; treatments a=3 cyclic b=3 cyclic 2; run;
The resulting Graeco-Latin square design is reproduced below. Notice how the values of r and c are ordered (1, 2, 3) as requested.
r --c-- --a-- --b-- 1 1 2 3 1 2 3 1 2 3 2 1 2 3 2 3 1 3 1 2 3 1 2 3 3 1 2 2 3 1
Chapter Contents |
Previous |
Next |
Top |
Copyright © 1999 by SAS Institute Inc., Cary, NC, USA. All rights reserved.