| Details of the OPTEX Procedure |
OUTPUT Statement
- OUTPUT OUT= SAS-data-set < options > ;
-
You use the OUTPUT statement to save a design in an output data set.
By default, the saved design is the best design found. You specify the
data set name as follows:
- OUT=SAS-data-set
-
gives a name for the output data set. The OUT= data set is required
in the OUTPUT statement.
The following options can be used:
- BLOCKNAME=variable-name
-
specifies the name to be given to the blocking variable in the output
data set. The default name is BLOCK. You can use this option in
conjunction with a STRUCTURE= option in the BLOCKS statement. See
Example 24.7 for an example.
- NUMBER=design-number
-
selects a design to output by specifying its design-number.
Designs are ordered by the value of the efficiency criterion that
is being optimized. Thus, a design-number of 1
corresponds to the best design found, a design-number of 2
corresponds to the second best design, and so on. The default
design-number is 1. To modify the number of
designs created, see the
ITER= option.
Alternatively, you can specify one of the following:
- NUMBER=DBEST
- selects the design that has the highest D-efficiency value.
- NUMBER=ABEST
- selects the design that has the highest A-efficiency value.
- NUMBER=GBEST
- selects the design that has the highest G-efficiency value.
- NUMBER=VBEST
- selects the design that has the minimum average standard error
for prediction.
These options can be used to find designs that are efficient for more than
one criterion For example, you can use the default CRITERION=D
option in the GENERATE statement with the NUMBER=GBEST option in
the OUTPUT statement to find the D-optimal design that has maximal
G-efficiency.
In fact, this is the best way to use the OPTEX
procedure to find G-efficient designs; see "G- and I-optimality"
for more details.
Copyright © 1999 by SAS Institute Inc., Cary, NC, USA. All rights reserved.
