Concatenating columns from a for loop.

Hi, So I have some code that creates a column of data in each run of a for loop. I want to concatenate those columns to build an array once the for loop has finished. So far I have....

vals = cell(size(images, 3), 2);
T2ind = cell(size(images, 1), 1);
T2 = cell(size(images, 1), size(images, 2));

for y = 1:size(images,1)
    for x = 1:size(images,2)
        if ((sum(images(y,x,:))/size(images, 3)) > 100)
            for z = 1:size(images, 3)
                echo = dat(z, 6);
                imgVal = images(y,x,z);
                vals(z,:) = {echo, imgVal};
            end

              f = fit(cell2mat(cellfun(@cell2mat, vals(:,1), 'UniformOutput', false)), cell2mat(vals(:,2)), 'exp1');
              coeff = coeffvalues(f);
              a= coeff(1);
              b = coeff(2);
              S1 = f(10);
              S2 = S1/exp(1);
              T2ind{x} = {((log(S2/a))/b)};         
          end
      end
      T2(y,:) = cat(1, T2ind{:});
  end

The idea being that T2 will be my array of 256 by 256 data points constructed from the 256 T2ind columns. I get a subscripted assignment dimension mismatch error for T2. Any help would be great! Thanks!

Error:

Subscripted assignment dimension mismatch.

    Error in T2_mapping (line 60)
        T2(y, :) = cat(1, T2ind{:});

Answer 1

[Jan]

Please post a complete copy of the error message in every case. Thanks.

T2(y,:) = cat(1, T2ind{:});

The right hand side is a row vector, the left hand side a column vector. Are you sure you want to apply CAT here?

[Shaun]

I've added the error code. So I want a set of columns (T2ind) to be concatenated into an array (T2). So,

T2(y,:) = cat(2, T2ind{:});

would be better? I tried that and got the same error. not sure if that's what you mean.