Please download it from the link.http://www.particleswarm.info/Programs.html. All the best

the following code is my work noted in Chinese, Matlab language.

%% 对PSO算法的重新编写，便于理解；

clc;clear;format;close all hidden;delete *.asv;

%% 全局参数初始化

c1=1.49445;c2=c1;maxgen=500;sizeop=100;

% 粒子速度限定

Vmax=1;Vmin=-1;

% 粒子范围限定

popmax=5;popmin=-5;

%% 粒子群参数初始化

for i=1:sizeop

pop(i,:)=5*rand(1,2);

V(i,:)=rand(1,2);

fitness(i,1)=fun(pop(i,:));

end

%% 初始粒子群状态极值状态参数

[Fmin,Find]=min(fitness);

gbest=pop(Find,:);

pbest=pop;

Fpbest=fitness;

%% 迭代搜索

for i=1:maxgen

for j=1:sizeop

% 根据初始群状态更新粒子

V(j,:)=V(j,:)+c1*rand*(pbest(j,:)-pop(j,:))+c2*rand*(gbest-pop(j,:));

% 速度限定

V(j,find(V(j,:)>Vmax))=Vmax;

V(j,find(V(j,:)popmax))=popmax;

pop(j,find(pop(j,:)

Codes of PSO in MATLAB is available here

https://www.researchgate.net/publication/296636431_Codes_in_MATLAB_for_Particle_Swarm_Optimization?ev=prf_pub

Code Codes in MATLAB for Particle Swarm Optimization

https://www.researchgate.net/publication/297245624_Particle_Swarm_Optimization_Algorithm_and_its_Codes_in_MATLAB

Research Particle Swarm Optimization: Algorithm and its Codes in MATLAB