Reading mat-files from one cell to another cell array

Question

Abdulhakim Alezzi 2020-12-9

评论： Fangjun Jiang 2020-12-11

Hi friends,

i have a matrix with cell (88 * 1), every row has a matrix with 30*768*20 double, where 20 is an (epochs).

I want to reconcatinate it to separted epoches (30*1), so for first row will be reconcatinated to 20 *88 *768 times of (30*1).

the final matrix will 1351680*1

I have tried it manually, but it's going to take a long time, but i believe its going to be easy using for loops.

for i= 1:20
      for s=1:88
           for d=1:768
O1=squeeze(XTrain{s,1}(:,:,i));
G= O1 (:,d);
end
    end
        end
O={G};

Answer 1

Fangjun Jiang 2020-12-9

Something like this. Look for function reshape().

O=XTrain;
for s=1:88
O{s}=reshape(XTrain{s},x,y,z);
end

I have a matrix (XTrain) with (88*1) cell. In every row of XTrain matrix, i have 30*768*20 double, as shown in figure above.

I want to reshape the cell matrix to have (30*1 only) by concatenating (768*22*88).

The final matrix will be (1351680*1) cell, where every row will represnet (30*1).

Fangjun Jiang 2020-12-11

Follow this example, play out how you want to flat the matrix, use shiftdim() if needed

%%
XTrain=repmat({rand(3,7,2)},8,1);
Out=cell2mat(XTrain');
Out=reshape(Out,3,[]);
Out=Out';
Out=mat2cell(Out,ones(1,112),3);