Display output 2D variable

Answered

Joël Haase

September 10, 2022 09:55

Hi,

I optimized a 6x8 Mvar.

How can i print this table?

0

• Official comment

  

  Simranjit Kaur

  • Gurobi Staff

  November 16, 2025 23:29

  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 try Gurobot, our chatbot interface offering instant, expert-level support.
• 

  Maliheh Aramon

  • Gurobi Staff

  September 13, 2022 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

  0
• 

  Maliheh Aramon

  • Gurobi Staff

  September 13, 2022 23:13 Edited

  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

  0

Post is closed for comments.