Input Matrix to Gurobi model in Matlab

Answered

Marina Santarelli

• November 30, 2020 07:40

Hi, I am writing to know if Gurobi can handle as input a matrix that is NOT a double real matrix. Indeed, since I have an "out of memory" error in Martlab, due to the limited dimensions the real array can have in Matlab, I had to transform the arrays A, Aeq, b, beq, intcon, ub and lb of my MILP problem into distributed matrices. However I get as error that "model.A must be a sparse double real matrix". Thank you in advance for your help!

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  Matthias Miltenberger

  Gurobi Staff

  • November 30, 2020 08:39

  Hi Marina,

  With the Matlab interface, there is no other way to build the model. I suggest you construct the model constraint-wise by looping over the rows of your matrix using another API - I recommend our Python API. I doubt that you will be able to solve this model, though, if already the constraint matrix is too large to be kept in memory.

  Cheers,
  Matthias

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  Marina Santarelli

  • November 30, 2020 08:52

  

  

  

  Thank you very much Matthias for your answer ;)

  Marina

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