initialization.m

% Hunger Games Search (HGS)
% Visions, Conception, Implementation, Deep Analysis, Perspectives, and Towards Performance Shifts
% Website of HGS: http://www.aliasgharheidari.com/HGS.html

%  Yutao Yang and Professor Huiling Chen (citations above 7000) and Ali Asghar Heidari (citations above 4000)
%  College of Computer Science and Artificial Intelligence, Wenzhou University, Wenzhou, Zhejiang 325035, China
%  Exceptionally Talented Researcher, Department of Computer Science, School of Computing, National University of Singapore, Singapore
%  National Elite, Exceptionally Talented Researcher, School of Surveying and Geospatial Engineering, College of Engineering, University of Tehran, Tehran 1439957131, Iran

%  Thanks to Professor Amir H Gandomi (citations above 19000)
%  Faculty of Engineering & Information Technology, University of Technology Sydney, NSW 2007, Australia

%  Last update: 02-17-2021

%  e-Mail: yutaoyang.style@foxmail.com,
%  e-Mail: as_heidari@ut.ac.ir, aliasghar68@gmail.com,
%  e-Mail (Singapore): aliasgha@comp.nus.edu.sg, t0917038@u.nus.edu
%---------------------------------------------------------------------------------------------------------------------------
%  Co-author: Yutao Yang(yutaoyang.style@foxmail.com), Huiling Chen(chenhuiling.jlu@gmail.com), Ali Asghar Heidari(as_heidari@ut.ac.ir), Amir H Gandomi(a.h.gandomi@gmail.com)
%---------------------------------------------------------------------------------------------------------------------------

% After use, please refer to the main paper:
% Yutao Yang, Huiling Chen, Ali Asghar Heidari, Amir H Gandomi, 
% Hunger Games Search: Visions, Conception, Implementation, Deep Analysis, Perspectives, and Towards Performance Shifts
% Expert Systems With Applications, https://doi.org/10.1016/j.eswa.2021.114864 (Q1, 5-Year Impact Factor: 5.448, H-INDEX: 184)
%---------------------------------------------------------------------------------------------------------------------------

%  Researchgate: https://www.researchgate.net/profile/Ali_Asghar_Heidari
%  Website of HGS: http://www.aliasgharheidari.com/HGS.html

% You can also use and compare with our other new optimization methods: (HHO)-2019- http://www.aliasgharheidari.com/HHO.html
%                                                                       (SMA)-2020- http://www.aliasgharheidari.com/SMA.html
%% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

% This function initialize the first population of search agents
function Positions=initialization(SearchAgents_no,dim,ub,lb)

Boundary_no= size(ub,2); % numnber of boundaries

% If the boundaries of all variables are equal and user enter a signle
% number for both ub and lb
if Boundary_no==1
    Positions=rand(SearchAgents_no,dim).*(ub-lb)+lb;
end

% If each variable has a different lb and ub
if Boundary_no>1
    for i=1:dim
        ub_i=ub(i);
        lb_i=lb(i);
        Positions(:,i)=rand(SearchAgents_no,1).*(ub_i-lb_i)+lb_i;
    end
end