| Details of the FACTEX Procedure |
EXAMINE Statement
- EXAMINE <options> ;
-
You use the EXAMINE statement to specify the characteristics of
the design that are to be listed in the output.
The options are remembered by the
procedure; once specified, they remain in effect until
you submit a new EXAMINE statement with different options or
until you turn off all EXAMINE options by submitting just
examine;
The following options are available.
- ALIASING<(d)>
- A<(d)>
-
lists the alias structure of the design,
which identifies
effects that are confounded with one another and are thus
indistinguishable.
You can specify (d) immediately
after the ALIASING option for a listing of the alias structure
with effects up to and including order d.
For example, the following statement requests aliases for
up to fourth-order effects (for example, A*B*C*D):
examine aliasing(4);
Each line of the alias structure is listed
in the form
effect=effect= ... =effect
for as many effects as are aliased with one another.
The default value for
d is determined
automatically from the model as follows:
- If you specify the model with a resolution number r in the
MODEL statement,
then d is the integer part of
(r+1)/2.
- If you specify the model with a list of effects in the
MODEL statement,
then d is the larger of
- one plus the largest order of an effect
to be estimated
- the largest order of an effect considered
to be nonnegligible
where main effects have order 1, two-factor interactions have order 2, and so on.
For details on aliasing, see "Alias Structure"
.
- CONFOUNDING
- C
-
lists the confounding rules used to construct the design.
For the
definition of confounding rules,
see "Confounding Rules"
and "Suitable Confounding Rules"
.
- DESIGN
- D
-
lists the points in the design in standard order
with the factor levels coded. For a
description of the randomization and coding rules, see "OUTPUT Statement"
.
Copyright © 1999 by SAS Institute Inc., Cary, NC, USA. All rights reserved.
