Cladio - what is the data that you used to generate the above function? Consider using ceil to round up your seconds to the nearest integer so that you can populate your 3600x1 matrix. For example, if
x = [0.1 12.34 45.32 258.45 1300.2 2501.9 3598.45];
y = [208 231 33 233 162 25 72];
data = zeros(3600,1);
then to populate data with x and y, you could try
data(ceil(x)) = y;
and you will observe that data(259) is 233. The above code assumes that no two packets arrive within the same second (else one will override the other in data).
