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Checking for variables with a specific index, whether the value is equal to a certain value.

  • 3 June 2023
  • 1 reply
  • 22 views

Hello, I have a problem.

I created two sets i and j for the variable X_i,j.

Now I want to add a constraint to see if the sum of all X_i,j with i="specific value” is equal to 10.

My guess would be something like:

sum[ ("Specific value”,j), variable(i,j) ] = 10;

But this obviously doesn't work, otherwise I wouldn't be asking.

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Best answer by Chris Kuip 5 June 2023, 07:51

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Userlevel 5
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Please substitute 'specific value’ for i as in:

sum( j, x('specific value', j ) = 10 

 

 

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