Nooooooo Harini ,

I felt it to be annoying and abandoned (Sorry you don't do it ) I felt fmincon or any optimizer is far easier that PSO

Hi, PSO methods are heuristic methods. You can certainly modify some of the parameters w, c1, c2 etc.. leading to different convergence behavior. You can have a look to this introduction to PSO methods:

http://mnemstudio.org/particle-swarm-introduction.htm

@Richard ..Thank you....my question is whether the command called particleswarm is useful which already have build in logic or should I separately specify w,c1,c2 and create my own code .Do you think both ways gives a same accuracy ? Thank you.

Hi, for the MATLAB function, the basic call "x=particleswarm(fun,nvars)" is autonomous in the sense that all the optional parameters are set by MATLAB. But you can also define these optional parameters by yourself calling "x=particleswarm(fun,nvars,lb,ub,options)". In options you can set your ouwn values of the optional parameters. see https://fr.mathworks.com/help/gads/particleswarm.html

@Aparna Sathya Murthy So you mean I can use fmincon command instead of particleswarm command which is more efficient?But..What is fmincon ?It works like particleswarm?Thank you.

Hi Harini,

I know it's quite an old thread but I hope I can still be a little bit useful to your cause.

As Richard Epenoy wrote, 'particleswarm' is a MATLAB built-in function. That is, you can use as it is without modifying anything or you can tweak it with your own parameters (e.g. the optional parameter 'SocialAdjustmentWeight' should be what you called C2).

If you want, you can have a look at the version of PSO that I implemented in MATLAB at this link:

https://uk.mathworks.com/matlabcentral/fileexchange/58895-ppso

I started the implementation before MATLAB had its own version but, as you can see from the examples and readme file, I performed some tests and it seems to perform well as compared to MATLAB's particleswarm. The big advantage, in my opinion, to use this version (or any other you might find or write by yourself) is that you know exactly what is going on. It's also a good way to actually learn in depth how the PSO works.

I hope this helps.

Cheers,

Alessandro