How to add a matrix variable to a matrix/array?

Awaiting user input

Jacob Jin

• September 04, 2021 07:31

I have defined an array and a matrix variable in the concrete model. Then I add the constraint below. However,  "Incompatible dimension" is casted. What's wrong with my code?

y_i = [[3, 2, 1, 1, 2],
[3, 2, 1, 1, 2],
[3, 2, 1, 1, 2]]

## y_ii's dimension: B * 1, i = 1, ..., N

y_ii = locals()
for i in range(N):
    y_ii['y_'+str(i+1)+str(i+1)] = m.addMVar(len(B),
                                   name = 'y_{}{}'.format(i+1, i+1))
for i in range(N):
    ### (1c)
    m.addConstr(y_ii['y_'+str(i+1)+str(i+1)] == y_i[i])

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• 

  Jaromił Najman

  Gurobi Staff

  • September 06, 2021 11:37

  Hi Jacob,

  Please post a minimal working example reproducing this issue. In particular, in your code snippet the values of \(N\) and \(B\) are missing.

  Best regards,
  Jaromił

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