Robert Luce
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Activity overview
Latest activity by Robert Luce-
Robert Luce commented,
That said, the workaround should no longer be necessary starting in the next feature release after 9.1, where you will be able to just do m.chgCoeff(c[0], x[0], 5) This works because indexing an MV...
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Robert Luce commented,
Hello José, unfortunately there isn't a shorthand for doing this in gurobipy yet, but I have taken note of your feature request in our development backlog. For now you will have to model the abso...
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Robert Luce commented,
Hello Jonathan, as written by Eli there currently is no way to change coefficents w.r.t. an Mvar object, but I have registered this in our backlog of future improvements to the matrix-friendly API....
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Robert Luce commented,
Hello Carlos, I have taken note of your request for an API to solve many small models in bulk. In order to understand the overhead problem you are facing a little better, it would be very valuable ...
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Robert Luce commented,
Hello Griffin, I have created a feature request to deal with term collection and dropping zero terms in LinExpr objects. For sure such zero terms are disposed of some time before the actual optimi...
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Robert Luce commented,
Hello Griffin, the bloat you are observing comes from the exponentially growing size of the symbolic representations of the linear expressions. Looking at your the example code (modified for brev...
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Robert Luce commented,
Victor, without knowing the particular bottleneck you are encountering, it's difficult to give specific advice. Formulating constraints and objectives in terms of data matrices and MVar objects ...
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Robert Luce commented,
Hello Victor, thanks for letting us know! Unfortunately the only linear transformations that we currently support are one-sided, and only for 1-D MVar objects, viz., A @ x. I have logged your ex...
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Robert Luce commented,
The syntax you are using is very reasonable, but unfortunately the expression y*y, which I would interpret as a quadratic expression of shape (5,), is not yet supported by gurobipy (all quadratic e...
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Robert Luce commented,
Hello Sven, in the next bugfix release 9.0.1 (due in the next few weeks or so), you'll be able to query relaxation and solution values on MVar objects in the callback. The result of such a query is...