LUYANG ZHANG

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Recent activity by LUYANG ZHANG Recent activity Votes

  • Question about converting a matrix to indicator matrix in gurobi

    Answered

    Hi, suppose I have a matrix/vector containing decision variable x, such as v =  [x_1, 2*x_2, x_3+x_4,...], now I want to convert it into a binary matrix such as k_i = 0 if v_i = 0, k_i = 1 if v_i >...

    LUYANG ZHANG 2 followers 1 comment 0 votes

  • Wrong algo of dual simplex

    Answered

    Hi team, I'm using GUROBI to solve a large-size MPS file which is roughly about 60G. This problem contains  26423572 rows, 265646022 columns, 962620739 nonzeros I tried with three methods, which ar...

    LUYANG ZHANG 3 followers 4 comments 0 votes