MATLAB: Add first element to a cell array

cell array

Dear,

I would like to add a new element in the first position in an cell array For example if ArrCell={[1],[2],[3],[4],[5]} is the existing cell and [new] is a matrix. I would like to get ArrCell={[new],[1],[2],[3],[4],[5]}

Of course, I can get this result using a temporal cell array and looping over all the elements of the existing one, but the quesion is if there an efficient way to get this result

Thanks in advance,

Best Answer

ArrCell = [ { new }, ArrCell ];

should work. I'm not at my machine with Matlab at the moment so can't double-check, but fairly sure that works.

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MATLAB: Bulk concatenation of cell array contents (without looping)

There may be a way to do it with no loops, but I think this is fast anyway. Here is a full example. Just change the numbers according to your needs....

% Make a nested cell array, as you describe it. 
for ii = 1:4  % A 1-by-4 cell
    for jj = 1:3  % Each element is a 1-by-3 cell.
       BC{ii}{jj} = rand(2,5);  %#ok  And each has is a 2-by-5 double 
    end
end
%



%
%
%
% Now extract it.
A = zeros(2*3,5,4);
for ii = 1:4
    A(:,:,ii) = cat(1,BC{ii}{:});
end
A = reshape(permute(A,[1,3,2]),2*3*4,5);

MATLAB: Insert elements to cell array

g = g(:,[1,1:end]);
g(:,1) = {M}

Best Answer

Related Solutions

MATLAB: Bulk concatenation of cell array contents (without looping)

MATLAB: Insert elements to cell array

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