Input Matrix to Gurobi model in Matlab

Answered

Marina Santarelli

November 30, 2020 07:40

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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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• Official comment

  

  Simranjit Kaur

  • Gurobi Staff

  June 23, 2025 03:04 Edited

  This post is more than three years old. Some information may not be up to date. For current information, please check the Gurobi Documentation or Knowledge Base. If you need more help, please create a new post in the community forum. Or why not try our AI Gurobot?.
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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

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  Thank you very much Matthias for your answer ;)

  Marina

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