Comparison to Other SAS Software

The RSREG Procedure

Comparison to Other SAS Software

Other SAS/STAT procedures can be used to fit the response surface, but the RSREG procedure is more specialized. The following statements model a three-factor response surface in PROC RSREG:

   proc rsreg;
      model y=x1 x2 x3;
   run;

These statements are more compact than the statements for other regression procedures in SAS/STAT software. For example, the equivalent statements for the GLM procedure are

   proc glm;
      model y=x1 x1*x1
              x2 x1*x2 x2*x2
              x3 x1*x3 x2*x3 x3*x3;
   run;

Additionally, PROC RSREG includes specialized methodology for analyzing the fitted response surface, such as canonical analysis and optimum response ridges.

Note that the ADX Interface in SAS/QC software provides an interactive environment for constructing and analyzing many different kinds of experiments, including response surface experiments. The ADX Interface is the preferred interactive SAS System tool for analyzing experiments, since it includes facilities for checking underlying assumptions and graphically optimizing the response surface. The RSREG procedure is appropriate for analyzing experiments in a batch environment.

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