Marina Csanady

Gurobi-versary
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Activity overview

Latest activity by Marina Csanady

  • Marina Csanady created a post,

    Subtour Elimination for several vehicles (VRP)

    1. Community
    2. Programming

       Hi,I try to implement the Subtour Elimination constraint for a Vehice Routing Problem with the "callback methode". I tried to modify the code from tsp.py so it would work with several vehicles (...

    • Marina Csanady
    • 2 followers
    • 0 comments
    • 1 vote

  • Marina Csanady created a post,

    Binary Variables were assigned a continous value

    Answered
    1. Community
    2. Algorithms

    I have a model with only binary or integer variables, but after solving my model, some variables are assigned a continous value. I cannot figure out why...I implemented the variables as follows. Af...

    • Marina Csanady
    • 2 followers
    • 1 comment
    • 0 votes

  • Marina Csanady commented,

    1. Community
    2. Programming
    3. using "if" in addVars()

    Thanks for your suggestions.I also tried to work with var.index, but also got the same error message. Why is that?   import gurobipy as gpfrom gurobipy import GRBSetI=[i for i in range(3)]SetJ=[i f...

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    • Marina Csanady
    • 0 votes

  • Marina Csanady created a post,

    using "if" in addVars()

    Answered
    1. Community
    2. Programming

    I'm working on a  problem with a lot of variables. In fact to much variables to run in reasonable time. My first approach was to create all possible varibles and delete the unnecessary ones (via mo...

    • Marina Csanady
    • 2 followers
    • 3 comments
    • 0 votes