How to implement importing data from csv file in optimization algorithm?

Hi,

I have attached the code used for PSO algorithm for 3D box packing. I am finding difficulty to modify the code to integrate with importing data from 'presents.csv' and also provide best solution for arrangements of the boxes on the grid, for example as '50 - GA (10-Apr-2024 03.48.47).csv'.

please do share some ideas on this. thanks.

pso.m

Answer 1

[Samay Sagar]

Based on my understanding, the “CreateModel” function needs be modified to accept an array of box dimensions, transforming the approach to accommodate three-dimensional considerations.

Here’s how you can modify the “CreateModel” function:

%
% Copyright (c) 2015, Yarpiz (www.yarpiz.com)
% All rights reserved. Please read the "license.txt" for license terms.
%
% Project Code: YPAP105
% Project Title: Solving Bin Packing Problem using PSO, FA and IWO
% Publisher: Yarpiz (www.yarpiz.com)
% 
% Developer: S. Mostapha Kalami Heris (Member of Yarpiz Team)
% 
% Contact Info: [e-mail], [e-mail]
%

function model = CreateModel(boxes)

    model.boxes = boxes; % Store the original box dimensions
    model.v = prod(boxes, 2); % Calculate volume of each box as product of dimensions
    model.n = size(boxes, 1); % Number of boxes
    model.Vmax = 30;

end

In pso.m, you can use the “readtable” function to read data from CSV file and pass it to the “CreateModel” function.

opts = detectImportOptions('presents.csv');
presentsData = readtable('presents.csv', opts);
boxes = table2array(presentsData(:, {'boxLengths', 'boxWidths', 'boxHeights'}));
model = CreateModel(boxes);  % Create Bin Packing Model

To save the best solution in a CSV file like '50 - GA (10-Apr-2024 03.48.47).csv', you can add a code snippet at the end of your PSO algorithm that writes the best solution to a CSV file. Assuming “BestSol” contains the best arrangement of boxes, including their positions, you can format this data into a table and use the “writetable” function:

bestSolTable = array2table(BestSol.Position); % Convert your solution to a table
filename = sprintf('%d - PSO (%s).csv', nPop, datestr(now, 'dd-mmm-yyyy HH.MM.ss'));
writetable(bestSolTable, filename);

For more information about “readtable”, “writetable” and “array2table”, you can refer the following documentation:

https://www.mathworks.com/help/matlab/ref/readtable.html

https://www.mathworks.com/help/matlab/ref/writetable.html

https://www.mathworks.com/help/matlab/ref/array2table.html

Hope this helps!

[Thulasy Chandran]

How do I get the 3D visualization of the boxes in the final arrangment from this algorithm?