PROC GA: Objective Function :: SAS/OR(R) 9.22 User's Guide: Local Search Optimization

The GA Procedure

Objective Function

evaluates a standard objective function from within a user subroutine

The inputs to the function are as follows:

selected	is an array that specifies the solution to be evaluated.
seg	is the desired segment of the solution to be evaluated.
type	is objective function name, which also determines the number and type of parameters expected.
parameter1-n	are optional parameters applicable to particular objective functions.

The accepted values for type and the corresponding parameters are summarized in Table 3.3.

Table 3.3 Objective Function Types
type	encodings	parameters
'TSP'	sequence	distances

The parameters are as follows:

distances

is a matrix of distances between locations, such that $\text{[math]}$ is the distance between location $\text{[math]}$ and $\text{[math]}$ .

The Objective call should be made only from within a user objective function. The precise actions of the standard objective functions are described in the section Objective Functions.

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