Delete duplicate cell in a cell of complex double.

Hi, how to delete duplicate cell in a cell using Matlab? I can run using single cell, but I can't when I change the input to cell in a cell.

Below is my code:

% Create cell in cell
F = cell(1,3)
F(1,1)={cell(1,1)}
F(1,2)={cell(1,8)}
F(1,3)={cell(1,8)}

F{1,1}(1,1)= {[0.04 0.2 0.56; 
                0.31 0.67 0.22]}
F{1,2}(1,1)= {[6+6j 7+3j 8-6j;
                6+8j 7-6j 3-3j]}
F{1,2}(1,2)= {[5+6j 8+5j 3-6j;
                6+8j 7-6j 2+3j]}
F{1,2}(1,3)= {[3-6j 2+1j 8-6j;
                5+6j 7+6j 9-3j]}
F{1,2}(1,4)= {[1-1j 7+5j 8+6j;
                9+8j 8-6j 9-2j]}
F{1,2}(1,5)= {[6+6j 7+3j 8-6j;
                6+8j 7-6j 3-3j]}
F{1,2}(1,6)= {[5+6j 8+5j 3-6j;
                6+8j 7-6j 2+3j]}
F{1,2}(1,7)= {[3-6j 2+1j 8-6j;
                5+6j 7+6j 9-3j]}
F{1,2}(1,8)= {[1-1j 7+5j 8+6j;
                9+8j 8-6j 9-2j]}
F{1,3}(1,1)= {[6+6j 7+3j 8-6j;
                6+8j 7-6j 3-3j]}
F{1,3}(1,2)= {[5+6j 8+5j 3-6j;
                6+8j 7-6j 2+3j]}
F{1,3}(1,3)= {[3-6j 2+1j 8-6j;
                5+6j 7+6j 9-3j]}
F{1,3}(1,4)= {[1-1j 7+5j 8+6j;
                9+8j 8-6j 9-2j]}
F{1,3}(1,5)= {[6+6j 7+3j 8-6j;
                6+8j 7-6j 3-3j]}
F{1,3}(1,6)= {[5+6j 8+5j 3-6j;
                6+8j 7-6j 2+3j]}
F{1,3}(1,7)= {[3-6j 2+1j 8-6j;
                5+6j 7+6j 9-3j]}
F{1,3}(1,8)= {[1-1j 7+5j 8+6j;
                9+8j 8-6j 9-2j]}

% Delete duplicate cells
for s=1:length(F)
  for w=2:length(F{s})

for ii = numel(F{w}):-1:2
    for jj = 1:ii-1
        if isequal((F{s}{ii}),(F{s}{jj}))
            F{s}{ii} = {};
            break
        end
    end
end
  end
end
F{:}

The output should be: remain value in F{1}{1}(1,1), F{1,2} (1,1)-(1,4) and F{1,3}(1,1)-(1,4). The rest cell (duplicate cells) will be deleted.

Thank in advance

[Stephen23]

@Noor Huda ja'afar: do you want to remove global duplicates (that occur anywhere in F), or only local duplicates (that only occur in the same cell of F) ?

[Jan]

By the way:

F{1,1} = cell(1,1)
% is more efficient than:
F(1,1) = {cell(1,1)}

In the second case, Matlab creates a cell and inserts it in a cell array. In the first case the array is inserted as cell element directly. The same for:

F{1,1}{1,1} = [0.04 0.2 0.56; 
               0.31 0.67 0.22]

Does the show code work? I get the error message: "Index exceeds array bounds."

What does "deleted" mean? Do you want empty cells or remove the cells?

Answer 1

[Stephen23]

As far as I can tell, you only want to remove local duplicate (i.e. only checking within the same cell of F):

F = {{[0.04,0.2,0.56;0.31,0.67,0.22]},{...
    [6+6j,7+3j,8-6j;6+8j,7-6j,3-3j],...
    [5+6j,8+5j,3-6j;6+8j,7-6j,2+3j],...
    [3-6j 2+1j 8-6j;5+6j,7+6j,9-3j],...
    [1-1j,7+5j,8+6j;9+8j,8-6j,9-2j],...
    [6+6j,7+3j,8-6j;6+8j,7-6j,3-3j],...
    [5+6j 8+5j 3-6j;6+8j,7-6j,2+3j],...
    [3-6j,2+1j,8-6j;5+6j,7+6j,9-3j],...
    [1-1j,7+5j,8+6j;9+8j,8-6j,9-2j]},{...
    [6+6j,7+3j,8-6j;6+8j,7-6j,3-3j],...
    [5+6j,8+5j,3-6j;6+8j,7-6j,2+3j],...
    [3-6j,2+1j,8-6j;5+6j,7+6j,9-3j],...
    [1-1j,7+5j,8+6j;9+8j,8-6j,9-2j],...
    [6+6j,7+3j,8-6j;6+8j,7-6j,3-3j],...
    [5+6j,8+5j,3-6j;6+8j,7-6j,2+3j],...
    [3-6j,2+1j,8-6j;5+6j,7+6j,9-3j],...
    [1-1j,7+5j,8+6j;9+8j,8-6j,9-2j]}} % more efficient way to create that array

F = 1×3 cell array
    {1×1 cell}    {1×8 cell}    {1×8 cell}

F{:}

ans = 1×1 cell array
    {2×3 double}

ans = 1×8 cell array
    {2×3 double}    {2×3 double}    {2×3 double}    {2×3 double}    {2×3 double}    {2×3 double}    {2×3 double}    {2×3 double}

ans = 1×8 cell array
    {2×3 double}    {2×3 double}    {2×3 double}    {2×3 double}    {2×3 double}    {2×3 double}    {2×3 double}    {2×3 double}

for kk = 1:numel(F)
    for ii = numel(F{kk}):-1:2
        for jj = 1:ii-1
            if isequal((F{kk}{ii}),(F{kk}{jj}))
                F{kk}(ii) = [];
                break
            end
        end
    end
end
F{:}

ans = 1×1 cell array
    {2×3 double}

ans = 1×4 cell array
    {2×3 double}    {2×3 double}    {2×3 double}    {2×3 double}

ans = 1×4 cell array
    {2×3 double}    {2×3 double}    {2×3 double}    {2×3 double}

Note that this is the same as my other answer, just replacing F with F{kk} and the corresponding outer loop:

https://www.mathworks.com/matlabcentral/answers/1777780-how-to-delete-a-duplicate-cells#answer_1024905

[NHJ]

Yes, this is what I want. Remove the local duplicate. I was quite confused when it became a cell in a cell. By the way, thank you very much

Answer 2

[Jan]

% Create cell in cell
F = cell(1,3);

F{1,1} = {[0.04 0.2 0.56;  0.31 0.67 0.22]};
F{1,2} = {[6+6j 7+3j 8-6j; 6+8j 7-6j 3-3j], ...
          [5+6j 8+5j 3-6j; 6+8j 7-6j 2+3j], ...
          [3-6j 2+1j 8-6j; 5+6j 7+6j 9-3j], ...
          [1-1j 7+5j 8+6j; 9+8j 8-6j 9-2j], ...
          [6+6j 7+3j 8-6j; 6+8j 7-6j 3-3j], ...
          [5+6j 8+5j 3-6j; 6+8j 7-6j 2+3j], ...
          [3-6j 2+1j 8-6j; 5+6j 7+6j 9-3j], ...
          [1-1j 7+5j 8+6j; 9+8j 8-6j 9-2j]};
F{1,3} = {[6+6j 7+3j 8-6j; 6+8j 7-6j 3-3j], ...
          [5+6j 8+5j 3-6j; 6+8j 7-6j 2+3j], ...
          [3-6j 2+1j 8-6j; 5+6j 7+6j 9-3j], ...
          [1-1j 7+5j 8+6j; 9+8j 8-6j 9-2j], ...
          [6+6j 7+3j 8-6j; 6+8j 7-6j 3-3j], ...
          [5+6j 8+5j 3-6j; 6+8j 7-6j 2+3j], ...
          [3-6j 2+1j 8-6j; 5+6j 7+6j 9-3j], ...
          [1-1j 7+5j 8+6j; 9+8j 8-6j 9-2j]};

% Delete duplicate cells
for iF = 1:numel(F)
  G    = F{iF};         % Process current cell of F
  nG   = numel(G);
  keep = true(1, nG);   % Elements to keep
  for iG = 1:nG
     for iG2 = iG+1:nG  % Check following elements of G
         if keep(iG2)   % Do not test, if excluded before
             keep(iG2) = ~isequal(G{iG}, G{iG2});
         end
     end
  end
  F{iF} = G(keep);
end
F{:}

ans = 1×1 cell array
    {2×3 double}

ans = 1×4 cell array
    {2×3 double}    {2×3 double}    {2×3 double}    {2×3 double}

ans = 1×4 cell array
    {2×3 double}    {2×3 double}    {2×3 double}    {2×3 double}