Code covered by the BSD License

### Highlights from Particle Swarm Optimization

• Demofunction: demo function to show the effectivenees of pso in solving the ackley non-convex function
• ackley(in)function: Ackley's function, from http://www.cs.vu.nl/~gusz/ecbook/slides/16
• pso(fun,np,lb,ub,inertia,...function: Find the minimum value of the cost function using pso algorithm
• View all files
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# Particle Swarm Optimization

by

### Yan Ou (view profile)

13 May 2013 (Updated )

[xMin,yMin] = pso(fun,np,lb,ub);

File Information
Description

fun: function handle (y = fun(x), x is column vector)
np: number of particles
lb, ub: lb<x<ub
xMin: yMin = fun(xMin)
yMin: minimum value of the cost function fun
pso finds the global minimum for a constraint function (convex or non-con) with multiple variables.

Required Products MATLAB
MATLAB release MATLAB 7.14 (R2012a)
12 Sep 2014 Maria Esmeral

### Maria Esmeral (view profile)

Good Morning.

I want to know if for using this function should I have instaled the optimization toolbox.

Thank you

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03 Mar 2014 Quan Wang

### Quan Wang (view profile)

Very elegant implementation.

29 Jan 2014 Yan Ou

### Yan Ou (view profile)

It dose constrain stuff. lb, ub: lb<x<ub

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16 Jan 2014 li jian

### li jian (view profile)

Hi,thanks for your contribution. The pso algorithm does not deal with constrained problems which makes it powerless to deal with practical problems.

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18 Dec 2013 Sukhoon

### Sukhoon (view profile)

oops...I may control the different LB & UB at the inside of my own test function. Sorry to make you confused. Thanks!

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18 Dec 2013 Sukhoon

### Sukhoon (view profile)

Hi,
How many different lb & ub can I set for your PSO? If it is 1 set, so far, then I wonder if you hava a plan to update your PSO for that. Thanks!

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09 Dec 2013 Yan Ou

### Yan Ou (view profile)

Hello Sanjaya:

The pso algorithm I posted does not deal with the integer programming issue as you mention.
But there should be two way to solve your problem.
1, Your problem have 5 variable restrict in integer domain. You can try all the combination of the 5 variable and use pso to solve the continuous optimization problem for the rest 9 variables. Then choose the smallest one from the 5 variables.
2, Try to relax your integer programming issue to a continuous programming issue.

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09 Dec 2013 sanjaya

### sanjaya (view profile)

Dear sir,
I have a problem with 16 variables, out of which 9 variables are in decimals with range 0 to 1 and the rest are integers with range 1 to 4. Can I use your codings of pso?

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04 Dec 2013 Ahmed ali

### Ahmed ali (view profile)

thanks

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16 May 2013 Yan Ou

### Yan Ou (view profile)

Please let me know if you guys can run the function or not

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16 May 2013 Yan Ou

### Yan Ou (view profile)

Please let me know if you guys can run the function or not

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14 May 2013 1.1

change the summary part to make user immediately understand the usage of function

14 May 2013 1.3

06 Nov 2013 1.4

updated version

25 Nov 2013 1.7

update

05 Dec 2013 1.8

06 Dec 2013 1.9

update pso

09 Dec 2013 1.10

update

17 Dec 2013 1.11