clear all
load deciles
% Use all row-by-row (dim 2)
%  all(deciles<0,2)
% Count the number of days
disp('All negative')
sum(all(deciles<0,2))

% Use any row-by-row (dim 2)
% any(deciles<0,2)
% Count the number of days
disp('At least 1 negative')
sum(any(deciles<0,2))

% If not any, then none
disp('None negative')
sum(~any(deciles<0,2))

disp('Another way to count those with none negative')
sum(all(deciles>=0,2))