Summary of Functions

Details of the OPTEX Procedure

Summary of Functions

Table 24.1, Table 24.2, and Table 24.3 classify the OPTEX statements and options by function.

Table 24.1: Summary of Options for Specifying the Design

Function Statement Option

Design Characteristics

Number of design points GENERATE N=number

Saturated design GENERATE N=SATURATED

Augmented design GENERATE AUGMENT=SAS-data-set

Bayesian optimal design MODEL / PRIOR=p₁,p₂, ...

Optimality Criteria

Minimize trace of (X'X)^-1 GENERATE CRITERION=A

Maximize |X'X| GENERATE CRITERION=D

Minimize mean minimum GENERATE CRITERION=U

distance to design

Maximize mean distance GENERATE CRITERION=S

between nearest design points

Model Specification

Specify independent effects MODEL effects

Exclude intercept term MODEL effects NOINT

Specify class variables CLASS variables

Static coding PROC OPTEX CODING=STATIC

Orthogonal coding PROC OPTEX CODING=ORTH

Orthogonal coding with PROC OPTEX CODING=ORTHCAN

respect to candidates only

Suppress coding of effects PROC OPTEX NOCODE

Block Specification

Specify general covariance BLOCKS COVAR=SAS-data-set <options>

matrix for runs VAR=variables

Specify general covariate model BLOCKS DESIGN=SAS-data-set <options>

Specify b blocks of size k BLOCKS STRUCTURE=(b)k <options>

Options for block specifications

Repeat the search n times ITER=n

Retain best m searches KEEP=m

Select initial design at random INIT=RANDOM

Select initial design in order INIT=CHAIN

Initial Design Characteristics

Random and sequential methods GENERATE INITDESIGN=PARTIAL<(m)>

Random initial design GENERATE INITDESIGN=RANDOM

Sequential initial design GENERATE INITDESIGN=SEQUENTIAL

Specify initial design GENERATE INITDESIGN=SAS-data-set

Table 24.2: Summary of Options for Searching for the Design

Function Statement Option

Design Search Specification

Retain best n searches GENERATE KEEP=n

Search n times GENERATE ITER=n

Specify candidate points PROC OPTEX DATA=SAS-data-set

Specify random seed PROC OPTEX SEED=number

Specify effective zero PROC OPTEX EPSILON= $\epsilon$

Design Search Methods

DETMAX algorithm with GENERATE METHOD=DETMAX<(level)>

maximum excursion level

Exchange algorithm GENERATE METHOD=EXCHANGE

k-Exchange algorithm GENERATE METHOD=EXCHANGE<(k)>

Sequential algorithm GENERATE METHOD=SEQUENTIAL

Fedorov algorithm GENERATE METHOD=FEDOROV

Modified Fedorov algorithm GENERATE METHOD=M_FEDOROV

Table 24.3: Summary of Options for Examining and Saving the Design

Function Statement Option

Save the Design

Best design OUTPUT OUT=SAS-data-set

Specific design OUTPUT OUT=SAS-data-set NUMBER=design-number

Block variable name OUTPUT OUT=SAS-data-set BLOCK=variable-name

Specify transfer variables ID variables

List the Design

Design characteristics EXAMINE

Design points EXAMINE DESIGN

Information matrix X'X EXAMINE INFORMATION

Specific optimal design EXAMINE NUMBER=design-number

Variance matrix (X'X)^-1 EXAMINE VARIANCE

Suppress all output PROC OPTEX NOPRINT

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Function	Statement	Option
Design Characteristics
Number of design points	GENERATE	N=number
Saturated design	GENERATE	N=SATURATED
Augmented design	GENERATE	AUGMENT=SAS-data-set
Bayesian optimal design	MODEL	/ PRIOR=p₁,p₂, ...

Optimality Criteria
Minimize trace of (X'X)^-1	GENERATE	CRITERION=A
Maximize \|X'X\|	GENERATE	CRITERION=D
Minimize mean minimum	GENERATE	CRITERION=U
distance to design
Maximize mean distance	GENERATE	CRITERION=S
between nearest design points

Model Specification
Specify independent effects	MODEL	effects
Exclude intercept term	MODEL	effects NOINT
Specify class variables	CLASS	variables
Static coding	PROC OPTEX	CODING=STATIC
Orthogonal coding	PROC OPTEX	CODING=ORTH
Orthogonal coding with	PROC OPTEX	CODING=ORTHCAN
respect to candidates only
Suppress coding of effects	PROC OPTEX	NOCODE

Block Specification
Specify general covariance	BLOCKS	COVAR=SAS-data-set <options>
matrix for runs		VAR=variables
Specify general covariate model	BLOCKS	DESIGN=SAS-data-set <options>
Specify b blocks of size k	BLOCKS	STRUCTURE=(b)k <options>
Options for block specifications
Repeat the search n times		ITER=n
Retain best m searches		KEEP=m
Select initial design at random		INIT=RANDOM
Select initial design in order		INIT=CHAIN

Initial Design Characteristics
Random and sequential methods	GENERATE	INITDESIGN=PARTIAL<(m)>
Random initial design	GENERATE	INITDESIGN=RANDOM
Sequential initial design	GENERATE	INITDESIGN=SEQUENTIAL
Specify initial design	GENERATE	INITDESIGN=SAS-data-set