Is your data sorted, or can the top and bottom 10% of the data be scattered anywhere around in your vector? Is the 10% defined by the number of points,
percent10 = round(0.1 * numel(vector)) % 12 elements
, or is it defined by the values
percent10 = min(vec) + 0.1 * (max(vec) - min(vec));
percent90 = min(vec) + 0.9 * (max(vec) - min(vec));
which could be any number of elements? How many elements do you want to find? 12 or some variable number depending on the values?
Or do you want the 10% and 90% points defined by the CDF of the values?
