FEI XUE

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Recent activity by FEI XUE Recent activity Votes
  • How to output all feasible solutions?

    Answered

    from gurobipy import *import numpy as npimport mathspace=gurobipy.Model('matchpattern')n=6pij=space.addVars(range(1,n+1), range(1,n+1),vtype=gurobipy.GRB.BINARY) space.update()space.setObjective(qu...

  • How to constrain my variables

    Ongoing

    I have a three-dimensional binary variable apij[p,i,j].When p is different, for example there are p1 and p2. What constraints should I add to make the ixj matrix corresponding to p1 different from ...

  • How to display more outputs?

    Answered

    I wrote a program and output all feasible solutions at the same time.But when the number of feasible solutions increases, I cannot view all the outputs.How can I make the output window display more...

  • How to view the result history?

    Answered

    Dear staff: I closed Spyder after gurobi calculated the result due to my mistake.I haven't had time to see the results.Can I still find the calculated result? Thank you very much!

  • TypeError:object of type 'gurobipy.gurobipy.LinExpr' has no len()

    Answered

    I need to add some constraints into my model. The code and formula are as follows. for i in range(1, n - 1): for k in range(3, n): BASE.addConstr( ntk3[i, k] == min_...

  • How to add a constraint to express the objective function as an even number?

    Answered

    Dear  staff: I now want to add a constraint, which means that the value of the objective function is even. The objective function is the sum of multiple items, and quicksum() is used. Is it impossi...