String problem

I have the following code

Lev=7;

for i=1:Lev
 str=strcat('A',int2str(i));
  for j=1:3
      str(j,:)=squeeze(Atr(i,j,:));
  end
end

This program showing erros like

    ??? Subscripted assignment dimension mismatch.

Error in ==> attractor_test at 80
        str(j,:)=squeeze(Atr(i,j,:));

Actually, I want to assigne names in run time of the program execution. In the above code str have to take names like str ---> A1, A2, A3, ...A7 and store values in A1, A2, A3 ....A7 respectively..

How to do that in matlab ?

Answer 1

[Bjorn Gustavsson]

That is usually a bat thing to do. There is a busload of questions like this, and a good explanation in FAQ-s everywhere and the matlab newsgroup.

What I suggest you do instead is to use cell-arrays:

Lev = 7;

for i1 = 1:Lev
  str = strcat('A',int2str(i1));
  for j2 = 1:3
    A{i1}(j2,:) = squeeze(Atr(i1,j2,:));
  end
end

Also it is nice to avoid i and j as loop variables, sooner or later you'll get them jumbled with the imaginary i = (-1)^(1/2).

HTH

[Andrei Bobrov]

n = size(Atr,1)

A = cell(n,1);

for i1 = 1:n

A{i1} = squeeze(Atr(i1,:,:));

end

OR

n =size(Atr)

A = mat2cell(reshape(permute(Atr,[3 2 1]),n(3),[])',ones(n(1)*n(2),1),n(3))

OR

n = size(Atr,1);

A = arrayfun(@(i1)squeeze(Atr(i1,:,:)),1:n,'un',0);