Could anyone help me to solve the issue.

code:The below code executes and gives the result.

But i want to view swarm_pos for all particles in workspace.

When I run the code it displays only with respect to the second time of for loop result in workspace.

could anyone please help me on this.

particles=2;
dimensions=2;
PPP=[1,2;
    3,4;
    5,6;
    7,8];
centroids=zeros(1,particles);
for particle=1:particles
    P=numel(particle);
    users=size(PPP,1);
    centroids(particle)= randi(users,1,P)
    fprintf('\nCentroids=%d\n',centroids(particle))
    swarm_pos =rand(centroids(particle),dimensions,P)
end

[Walter Roberson]

See also https://www.mathworks.com/matlabcentral/answers/460692-could-anyone-help-me-to-solve-the-following-issue

Answer 1

[Bhaskar R]

Since the matrix size assigning to the variable "swarm_pos" is deifferent for each iteration, initialize the matrix as cell array class matrix, then you can get the variable as you required in the workspace

Modify your code as below

particles=2;
dimensions=2;
PPP=[1,2;
    3,4;
    5,6;
    7,8];
centroids=zeros(1,particles);
% Initialize your variable as cell array type as your required dimention either (1xparticles) or (particlesx1)
swarm_pos = cell(1,particles);
for particle=1:particles
    P=numel(particle);
    users=size(PPP,1);
    centroids(particle)= randi(users,1,P)
    fprintf('\nCentroids=%d\n',centroids(particle))
    swarm_pos{particle} =rand(centroids(particle),dimensions,P)    %  stores array values for each iteration 
end

Access you data as

swarm_pos{1}, swarm_pos{2}

[jaah navi]

ok.It works

I then continued the code as follows:

particles=2;
dimensions=2;
PPP=[1,2;
    3,4;
    5,6;
    7,8];
centroids=zeros(1,particles);
swarm_pos = cell(1,particles);
for particle=1:particles
    P=numel(particle);
    users=size(PPP,1);
    centroids(particle)= randi(users,1,P)
    fprintf('\nCentroids=%d\n',centroids(particle))
    swarm_pos{particle} =rand(centroids(particle),dimensions,P)    %  stores array values for each iteration 
end
for T=1:iterations 
  for particle=1:particles
     P=numel(particle);
     distances=zeros(users,centroids(particle),P)
     for centroid=1:centroids(particle)
         distance=zeros(users(particle),1);
      for user=1:users
           distance(user,1)=norm(swarm_pos(centroid,:,P)-PPP(user,:))
       end
         distances(:,centroid,P)=distance
       end
end
end

wheni run the code i am getting error stating Undefined operator '-' for input arguments of type 'cell'.

Could you please help me to overcome it.

[Bhaskar R]

As I don't know your requiremet i couldn't get how are you doing norm at error occured.

Any way I can suggest you to access values from the the variable "swarm_pos" you can make change as

distance(user,1)=norm(swarm_pos{particle}(centroid,:,P)-PPP(user,:));

Even this modification is not enough for you, you get error in the statement

distance=zeros(users(particle),1);

because users is the scaler variable

I need these point to rectify error