Python, Pandas: average every 2 rows together
A fast way to do it:
>>> s = pd.Series(range(10))>>> s0 01 12 23 34 45 56 67 78 89 9>>> ((s + s.shift(-1)) / 2)[::2]0 0.52 2.54 4.56 6.58 8.5The "proper way" I guess would be something like:
>> a = s.index.values>>> idx = np.array([a, a]).T.flatten()[:len(a)]>>> idx[0 0 1 1 2 2 3 3 4 4]>>> s.groupby(idx).mean()0 0.52 2.54 4.56 6.58 8.5But it is ~2x slower and gets worse with increasing size.