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T = rand(365,10); % Some random data
% Define the range as [0, 0.2]. rangesLowValue = 0; rangesHighValue = 0.2; % Count the number of values in the range: countLessThanPoint3 = sum(T(:) >= rangesLowValue & T(:)<rangesHighValue)
A = rand(20,10); A(A < .3) = -A(A < .3); % your array
out = nnz(A < 0);