add conditional constraint

回答済み

Jin Huang

2021年12月16日 23:03

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Hi, could u please tell me how to add this kind of constraint to the optimization problem?

f(x)<=2;

Here, x=[x1,x2,x3,x4]; x1-x4 are  variables.

f(x)= x1,if x2>x4;

      =x3, if x2<=x4;

Here the value of the function f(x) is x1 or x3, while it depends on whether x2 or x4 is bigger.

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  Simranjit Kaur

  • Gurobi Staff

  2025年06月23日 02:42 編集済み

  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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  Jaromił Najman

  • Gurobi Staff

  2021年12月20日 08:18

  Hi,

  You can find an example of how to formulate such an if-else-statement in the stackexchange post How to write if else statement in Linear programming?

  Best regards,
  Jaromił

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  Jin Huang

  2021年12月20日 22:03

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  Hi Jaromił,

  Really thanks for ur help. I figured it out.

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