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def quantile (x, p) correction in statistics.py #38

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@mdusan mdusan commented Apr 23, 2017

If the value p = 1 (100%) is chosen, sorted(x)[p_index] is out of bounds because
p_index = p * len(x) = 1 * len(x) = len(x) and the list x is indexed from [0] to [len(x)-1].

Correction proposed (line 50 of statistics.py):

  • change p_index = int(p * len(x)) to p_index = int(p * len(x)) - 1

If the value `p = 1 (100%)` is chosen,  `sorted(x)[p_index]` is out of bounds because `p_index = p * len(x) = 1 * len(x) = len(x)` and the list `x` is indexed from `[0]` to `[len(x)-1]`. The proposed correction is to change line 50 of statistics.py from `p_index = int(p * len(x)) - 1` to `p_index = int(p * len(x)) - 1`.
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