Syntax of a filter file

CPLEX supports the syntax of a filter file.

A filter file may contain one or more diversity filters, one or more range filters, or a combination of both types of filter.

The filters in a file are associated with a particular model. The name of the model follows the keyword NAME.

In a formatted filter file, the strings -inf and inf may be used to denote "no limit" in each of these contexts:

• the lower bound of a diversity or range filter,

• the upper bound of a diversity or range filter.

Here is a sample filter file. This filter is suitable for use with the model in Example: simple facility location problem in the CPLEX User’s Manual. An explanation of this file appears in Diversity filters and Range filters.

NAME location
DIVFILTER f1 2 inf
x1 1.0 1
x2 1.0 1
x3 1.0 0
x4 1.0 0
RNGFILTER f2 -inf 0
transport 1.0
fixed -1.0
ENDATA