title: "Conversion to cell from double is not possible"
body: <p>I am trying to find features of EEG signals using TQWT. For finding the features of many columns I tried following code, yet I am getting the error:</p>
  
  <blockquote>
    <p>Conversion to cell from double is not possible.</p>
  </blockquote>
  
  <p>The code is:</p>
  
  <pre><code>for k = 1:9
    filename = sprintf('F00%d.txt',k);
    a(:,k) = load(filename);
    temp = a(:,k);
    x = temp(2:length(a(:,k)));
    w = tqwt(x,1,3,3);
    [a1,a2,a3,a4] = deal(w{:});
    a = {a1, a2, a3, a4};
    for j = 1:4
      H(k,j) = KraskovEntropyV2((a{j})', 2, 'euclidean');   
      j=j+1;
    end       
  end
  </code></pre>
  
  <p>What can I do about this error?</p>