Hello Marc,
if B1 is a set, you probably want to write:
s.t. {b in B1} c1 : x[b,21] = 1;
# or
s.t. c2 : x["b",21] = 1; # where "b" is a member of B1
Best regards
Xypron
On 29.07.2011 16:45, Marc Goetschalckx wrote:
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.
Thanks.
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