Particle Swarm Optimization help

I new in matlab i need some help about with a code in matlab. I want make the Particle Swarm Optimization and i want put a mouse click to define a point in space with a window size [min1, max1] and [min2, max2]. Then a cluster consisting of n = 10 particles initialized and searches for the point set initially by the user.

my code is this:

clear all;

numofdims = 30;

numofparticles = 50;

c1 = 2;

c2 = 2;

numofiterations = 1000;

V = zeros(50, 30);

initialpop = V;

Vmin = zeros(30, 1);

Vmax = Vmin;

Xmax = ones(30, 1) * 100;

Xmin = -Xmax;

pbestfits = zeros(50, 1);

worsts = zeros(50, 1);

bests = zeros(50, 1);

meanfits = zeros(50, 1);

pbests = zeros(50, 30);

initialpop = Xmin + (Xmax - Xmin) .* rand(numofparticles, numofdims);

X = initialpop;

fitnesses = testfunc1(X);

[minfit, minfitidx] = min(fitnesses);

gbestfit = minfit;

gbest = X(minfitidx, :);

for i = 1:numofdims

      Vmax(i) = 0.2 * (Xmax(i) - Xmin(i));

      Vmin(i) = -Vmax(i);
  end

for t = 1:1000

      w = 0.9 - 0.7 * (t / numofiterations);

      for i = 1:numofparticles

          if(fitnesses(i) < pbestfits(i))

              pbestfits(i) = fitnesses(i);

              pbests(i, :) =  X(i, :);

          end

      end

      for i = 1:numofparticles

          for j = 1:numofdims

              V(i, j) = min(max((w * V(i, j) + rand * c1 * (pbests(i, j) - X(i, j))...

                  + rand * c2 * (gbest(j) - X(i, j))), Vmin(j)), Vmax(j));

              X(i, j) = min(max((X(i, j) + V(i, j)), Xmin(j)), Xmax(j));

          end

      end

      fitnesses = testfunc1(X);

      [minfit, minfitidx] = min(fitnesses);

      if(minfit < gbestfit)

          gbestfit = minfit;

          gbest = X(minfitidx, :);

      end

      worsts(t) = max(fitnesses);

      bests(t) = gbestfit;

      meanfits(t) = mean(fitnesses);

end

[scorpio 09]

• i am getting error in line
• initialpop = Xmin + (Xmax - Xmin) .* rand(numofparticles, numofdims);
• Error using *
• Inner matrix dimensions must agree.
• please help me

Answer 1

[Walter Roberson]

"I want to do this" is not something we can act on. Give us a question. A question about MATLAB. A statement of what you are aiming for is not a question. "Why am I unable to color my graphics input cursor 'Gold' in MATLAB?" is an example of a question. "Why do all my MATLAB programs that start with 'clear all' fail to work?' is a question. "What are some good resources for learning MATLAB?" is a question. "I want a really good cup of Hot Cocoa." is a statement.

Answer 2

[Yarpiz / Mostapha Heris]

A structured and well-commented MATLAB implementation of Particle Swarm Optimization (PSO) is available to download in the following FEX link:

http://www.mathworks.com/matlabcentral/fileexchange/52857-particle-swarm-optimization--pso-

[younes youyou]

i have this error with this PSO algorithm ? how can i solve it many thanks

Index exceeds matrix dimensions.

Error in Sphere (line 16) z= 2.633*x(1)+2.992*x(2)+3.134*x(3)+3.678*x(4)+3.620*x(5)+2.948*x(6)+1.607*x(7)+2.952*x(8)+3.348*x(9)+3.680*x(10)+3.774*x(11)+2.995*x(12)+3.237*x(13)+1.608*x(14);

Error in pso>@(x)Sphere(x)

Error in pso (line 160) disp ([ 'CostFunction = ' (CostFunction(it))])