how to convert cell to double

I have problem to convert cell (attached file) to double, thanks in advance for any help.

Answer 1

[Adam Danz]

There are 12 elements in your cell array. Each element is a matrix but of different sizes.

OUT =
  1×12 cell array
  Columns 1 through 7
    {73×6 double}    {1581×12 double}    {105×6 double}    {105×6 double}    {113×6 double}    {264×6 double}    {98×7 double}
  Columns 8 through 12
    {98×6 double}    {98×7 double}    {88×6 double}    {994×3 double}    {194×6 double}

If you want to combine all elements of your cell array some common options are

1. convert them to a single vector (row or column)
2. equate the number of columns in all matrices and fill the missing elements with NaN or another missing value indicator. Then concatenate the matrices vertically
3. equate the number of rows in all matrices, fill the missing elements, and concatenate horizontally
4. equate the number of rows and columns in all matrices, fill the missing elements, and concatenate in a 3D array.

% OUT is the 1xn cell array where each element contains a matrix of different sizes. 
    
% METHOD: put all values into a column vector
% Transpose the result for a row vector
m = cell2mat(cellfun(@(c){c(:)},OUT)'); 
    
% METHOD: Concatenate matrices vertically, fill missing columns with NaN.
maxNumCol = max(cellfun(@(c) size(c,2), OUT));  % max number of columns
mPad = cell2mat(cellfun(@(c){padarray(c,[0,maxNumCol-size(c,2)],NaN,'Post')},OUT)'); 
    
% METHOD: Concatenate matrices horizontally, fill missing rows with NaN.
maxNumRow = max(cellfun(@(c) size(c,1), OUT));  % max number of rows
mPad = cell2mat(cellfun(@(c){padarray(c,[maxNumRow-size(c,1),0],NaN,'Post')},OUT)); 

% METHOD: Concatenate matrices along 3rd dimension, fill missing rows with NaN.
maxMatSz = max(cell2mat(cellfun(@(c) {size(c)}, OUT)'),[],1);  % [max rows, max cols]
cPad = cellfun(@(c){padarray(c,[maxMatSz(1)-size(c,1),maxMatSz(2)-size(c,2)],NaN,'Post')},OUT);
mPad = cat(3, cPad{:}); 

[Adam Danz]

Farshid Daryabor's answer moved here as a comment.

Thanks

[Adam Danz]

Glad I could help!