Hello GLPK List,
I see from the GLPK Wikibook that there's no ability to create reporting
variables (err, just learned that others call them "defined variables").
https://en.wikibooks.org/wiki/GLPK/GMPL_Workarounds#Mimicking_an_AMPL_defined_variable
I want to explore the last sentence in that section ("But you can use a
structural variable and a constraint instead to achieve the same effect
— the downside being that this formulation may render your problem
harder to solve"). The models that I'm working with are necessarily
large (roughly 1e5 [C] x 1e5 [R], give or take an order of magnitude
depending on the input), and I'd like to avoid adding any more variables
to the solver's matrix.
Given that I can't create constraints /after/ a solve statement (i.e. to
re-solve starting from the previous solution), does that mean that my
only option is a post-GMPL step with another tool (e.g. C, Perl, Python)?
Thanks,
Kevin
_______________________________________________
Help-glpk mailing list
[email protected]
https://lists.gnu.org/mailman/listinfo/help-glpk
