Arash Baharvandi

Gurobi-versary
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Activity overview

Latest activity by Arash Baharvandi

  • Arash Baharvandi created a post,

    Runtime

    Answered
    1. Community
    2. Programming

    Hi, I have two equal problems that second one include more constraints i.e. three times than first one. First problem would be run in 5 seconds, while second one takes 900 seconds that it does not ...

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    • 2 followers
    • 1 comment
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  • Arash Baharvandi commented,

    1. Community
    2. Algorithms
    3. Different platforms and different results

    Thanks a lot for your help.

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  • Arash Baharvandi commented,

    1. Community
    2. Algorithms
    3. Different platforms and different results

    Thank you, I figured out the issue. I simplified code and removed all fixed variables. from gurobipy import *import numpy as np#indicesmyList = list(range(0,4))vctr=np.array(myList)I=vctr# generato...

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  • Arash Baharvandi commented,

    1. Community
    2. Algorithms
    3. Different platforms and different results

    Hi,   I have following code , but I do not know when I increase ''peak'' model is infeasible, while it should be feasible. For peak=10, I got optimal solution, but for more than 10, it will be infe...

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  • Arash Baharvandi created a post,

    Different platforms and different results

    Answered
    1. Community
    2. Algorithms

    Hi, I wrote a problem to be solved by Gurobi (Python), before increasing a parameter, I got correct results by Gurobi and another platform, when I increase a parameter I will get infeasible problem...

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    • Edited
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    • 8 comments
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  • Arash Baharvandi commented,

    1. Community
    2. Programming
    3. Adding objective functions and variables to a matrix

    Sorry for not clarifying it well.   I have a parameter (vf) which is a matrix, this matrix contains two columns and I want to use each column for any problem. vf= np.array([[1,2],[2,4],[4,4]]) In f...

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  • Arash Baharvandi commented,

    1. Community
    2. Programming
    3. Adding objective functions and variables to a matrix

    Thanks for your response,   I mean I have the following problem and I want to solve this problem 3 times, I have a matrix vf (with 3 columns), and I want to solve this problem for each column of th...

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  • Arash Baharvandi created a post,

    Adding objective functions and variables to a matrix

    Answered
    1. Community
    2. Programming

    Hi,   I have an optimization problem. A parameter will get new values and solve the problem again. How can I define a matrix included objective functions and variables? (python with Gurobi package)...

    • Arash Baharvandi
    • 2 followers
    • 5 comments
    • -1 votes

  • Arash Baharvandi commented,

    1. Community
    2. Programming
    3. Adding a column to a parameter and rerun it for new column

    Thank you for your response,   I have another question. I really appreciate you for responding my question. I have a constraint, and there is relationship between its indices, for example if i=1, t...

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  • Arash Baharvandi created a post,

    Adding a column to a parameter and rerun it for new column

    Answered
    1. Community
    2. Programming

    Hi,   I have a parameter in a 4*2 matrix. I want to run my optimization problem first for first column,then for second column in Gurobi. v[i,j] is in my constraint, so I wanna run it first for v[...

    • Arash Baharvandi
    • 2 followers
    • 3 comments
    • 0 votes