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[Help-glpk] Initializing a few decision variables

From: Marc Goetschalckx
Subject: [Help-glpk] Initializing a few decision variables
Date: Fri, 29 Jul 2011 10:45:33 -0400
User-agent: Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US; rv: Gecko/20100216 Thunderbird/3.0.2

I am using a model coded in GMPL.
The model has a large two-dimensional array of x variables, one dimension has literal indices that are defined in a set in the data segment (example is B1)
This model is running and solving so far.
However, I need to initialize a very few of the x variables because of boundary conditions.
Statement in the model section is similar to
s.t. x[B1,21]=1;
This cannot be done because B1 is not yet defined (from the data section).
How can I initialize some of the variables in the data section, or what is the sequence of actions that can achieve this.

Marc Goetschalckx
Industrial and Systems Engineering
Georgia Institute of Technology, Atlanta, GA, USA

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