initialization.m

%___________________________________________________________________________________________________________________________________________________%
% Parrot Optimizer (PO) source codes (version 2.0)
% PO
% Parrot optimizer: Algorithm and applications to medical problems
% Website and codes of Parrot optimizer(PO):http://www.aliasgharheidari.com/PO.html

% Junbo Lian, Guohua Hui, Ling Ma, Ting Zhu, Xincan Wu, Ali Asghar Heidari, Yi Chen, Huiling Chen

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% Authors: Junbo Lian (junbolian@qq.com), Ali Asghar Heidari(as_heidari@ut.ac.ir, aliasghar68@gmail.com), Huiling Chen(chenhuiling.jlu@gmail.com) 

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% After use of code, please users cite to the main paper on Parrot optimizer (PO):
% Junbo Lian, Guohua Hui, Ling Ma, Ting Zhu, Xincan Wu, Ali Asghar Heidari, Yi Chen, Huiling Chen*
% Parrot optimizer: Algorithm and applications to medical problems
% Computers in Biology and Medicine, ELSEVIER - 2024 

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% 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