Display output 2D variable

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Joël Haase

2022年09月10日 09:55

Hi,

I optimized a 6x8 Mvar.

How can i print this table?

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  Simranjit Kaur

  • Gurobi Staff

  2025年11月16日 23:29

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  Maliheh Aramon

  • Gurobi Staff

  2022年09月13日 05:12

  Hi Joël, 

  Assuming \(\texttt{x}\) represents the matrix variables, you can use one of the approaches below to print the values of the MVar object in the current solution.

  x = m.addMVar(shape=(6, 8), name="x")

  # Approach 1: This prints a numpy array with the (i, j) element being the value of
  # the decision variable x[i, j]
  values = m.getAttr("X", m.getVars())
  values = np.array(values).reshape((6, 8))
  
  # Approach 2: This prints a key-value pair mapping the variable indices to the
  # variable values in the current solution
  values = {(i, j): x[i, j].X for i in range(6) for j in range(8)}

  Best regards, 

  Maliheh

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• 

  Maliheh Aramon

  • Gurobi Staff

  2022年09月13日 23:13 編集済み

  Hi Joël, 

  There is also a third approach that is much neater. You can simply query the attribute \(\texttt{X}\) on the MVar object \(\texttt{x}\) and this will give you a numpy array.

  # Approach 3
  x.X

  Sorry for missing this easy and efficient approach!

  Best regards,

  Maliheh

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