If you are only interested in the latest 10 matrices, then you can create a "circular" cell array of fixed size that is updated at each iteration, overwriting the older matrices as the code iterates:
circularArraySz = 10;
circularArray = cell(circularArraySz,1); % create the circular cell array
nextIdx = 1; % the index into the array in which
% to insert the next matrix
% do the for loop
for i=1:20000
% do the work to generate the matrix A
% add A to the cell array
circularArray{nextIdx} = A;
% increment to the next index
nextIdx = nextIdx + 1;
% wrap around to the beginning of the circular array if the index
% is greater than circularArraySz
if nextIdx>circularArraySz
nextIdx = 1;
end
end
When the loop ends, circularArray will have the last ten matrices. Try it out and see what happens!
