Constraint: Sum of all variables to be equal to a given value

Answered

Roger Creus

May 12, 2021 14:18

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Hello everybody, 

I wonder if someone can give me an intuiton on how to define in R the constraint that sets:

sum(all variables x_i) = B

Where B is a know numeric value and the model's only variables are x_i for i=1...N

 

Thank you!

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• Official comment

  

  Simranjit Kaur

  • Gurobi Staff

  June 23, 2025 02:55 Edited

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• 

  Matthias Miltenberger

  • Gurobi Staff

  May 17, 2021 11:22

  Hi Roger,

  You can check this R example for three different ways of adding such a constraint:

  Gurobi R example - lp

  You need to define the matrix coefficients - in this case just a row of ones - to model the sum.

  Cheers,
  Matthias

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