Hi Joris,
From my understanding, you would like to extract the non-empty cells in a cell array. And then you want to extract the last rows of the non-empty cells and assign to a new cell array. Here is an example of cellfun to assist you in performing the same without using for loops.
% Let us assume an empty cell A of size (3,3)
A = cell(3,3);
% Use cellfun to perform operations on each cell
% The following command applies the function isempty to each cell
idx1 = ~cellfun(@isempty,A);
% indx1 has all zeroes indicating all cells are empty
% Add some random non-empty elements in the cell A
A{2,2} = [1,0;2,0;3,5];
A{2,3} = [4;5;6];
% Find all the non-empty cells
indx2 = ~cellfun(@isempty,A);
% indx2 gives the position of the non-empty cells
% Index into the non-empty cells
B = A(indx2);
% Find the last row element in each of the cells
% To return values in cell array, keep UniformOutput as false.
C = cellfun(@(x) x(end,:),B,'UniformOutput',false);
% The cell array C contains the last row in each of the non-empty cells
