Using eval function to change variable name with each matrix.
A = randint(10000,4);
Dividing the given matrix A in to 5 equal sets in a sequential manner.
for i=1:5
j=(2000*(i-1))+1;
%A_size = size(A(j:j+1999,:));
eval([‘A_’ num2str(i) ‘=’ ‘A(‘ num2str(j) ‘:’ num2str(j) ‘+1999,:);’]);
end