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Questions - linear-optimization

How to extract variables that equal a certain value in pyomo?

I am building a linear optimization model and trying to extract key information from my decision variable values. instance.x.display() displays the following sample x : Size=121, Index=x_index Key...
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Berbatov

variables

pyomo

linear-optimization

Votes: 0

Answers: 1

Latest Answer

You can extract all values to a more user-friendly format by: x_dic = x.get_values() for i in x_dic.keys(): if r[i]==1: print(i) I am sure there is a nicer way but this should do the tric...
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Aggotrom

Python PulP linear optimisation for off-grid PV and battery system

I'm trying to use linear optimisation to minimise the size of solar PV and battery for an off-grid property. I have solar irradiance data and household energy consumption data - I have created a year'...
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jmcq2

python

optimization

linear-programming

pulp

linear-optimization

Votes: 0

Answers: 1

Latest Answer

Hello and welcome to the site. Interesting problem. Your problem appears to be set up correctly. You are getting the "massive discharge" because you are artificially (?) constraining the b...
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AirSquid

model.update performance in the model

I have a question about performance of the model.update in the gurobipy library. Let's say I have a list of objects which I want to add as a variable to the model, also I want to add a constraint to e...
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Ryszard Eggink

optimization

mathematical-optimization

gurobi

linear-optimization

Votes: 0

Answers: 2

Latest Answer

Yes, it's the usual way to add all the variables first. Note that the model.addVar() method already returns the variable which can directly be used without calling model.update(). Therefore, you don't...
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joni

Microsoft Solver Foundation gives wrong answer for a simple ILP

I want to solve a binary Linear Problem in C# using Microsoft Solver Foundation. I don't know why I get wrong answer. The Objective Value should be 41.1 but I get 213. The value of 5 variables should ...
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shm

c#

solver

constraint-programming

ms-solver-foundation

linear-optimization

Votes: 0

Answers: 1

Latest Answer

The following MiniZinc model arrives at 14 as maximum value for the objective: set of int: rows = 1..5; set of int: cols = 1..7; array[rows, cols] of 0..1: vars_Matrix = [|0, 0, 1, 0, 1, 1, 1 ...
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Axel Kemper

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