High CPU time when defnining a high dimensional variable

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Mohammadmahdi Hajiha

2023年11月03日 14:25

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It takes a great deal of CPU time to define a high dimensional variable specially when the number of elements per dimension is large. How could we resolve this?

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• Python

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  Simranjit Kaur

  • Gurobi Staff

  2026年11月13日 01:35

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  Mario Ruthmair

  • Gurobi Staff

  2023年11月08日 15:47

  Hi,

  Are you saying that creating the variables with "model.addVars( N1, N2, N3, ... )" takes a long time?

  The main question is whether all variables in N1 x N2 x N3 x ... are needed in your model. If not, it makes sense to predefine a list of tuples that corresponds to a subset of the complete cross-product, and use this in "model.addVars( tuples )".

  Best regards,
  Mario

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