Jonathan Eckstein
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Latest activity by Jonathan Eckstein-
Jonathan Eckstein commented,
OK, thanks for checking. I will just delete the constraints and add back modified ones. I suspect that will be slow, but this is a prototype, proof-of-concept implementation, so its speed is not ...
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Jonathan Eckstein commented,
OK, thanks! Please let me know what you find out. Setting up my objective function with only scalar variables would be hellish. I suppose that I could make big pile of scalar variables, each with...
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Jonathan Eckstein commented,
Here is a 12-line program that produces the same error. Possibly I am doing something really dumb, but it is my first time with this API. Optimizing the model instead of updating doesn't change t...
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Jonathan Eckstein commented,
Yes, I did update the model first. I'll try to post a self-contained example soon.
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Jonathan Eckstein created a post,
Python call to chgCoef yields attribute error for __cindex__
AnsweredIn the Gurobi Python API, I am trying to change one coefficient within a linear constraint of a quadratic optimization model. I call grbModel.chgCoeff(constr, grbx[j], newvalue) Where grbMod...