python - How to calculate average of every three consecutive elements skipping one element after every iteration -


here list. 

 1 2 3 4 5 6 7 8 9 10.

i calculate average of every 3 consecutive elements. instance, output be:

na na 2 3 4 5 6 7 8 9

how this?

regards

use rolling window:

in [117]: s = pd.series('1 2 3 4 5 6 7 8 9 10'.split())  in [118]: s out[118]: 0     1 1     2 2     3 3     4 4     5 5     6 6     7 7     8 8     9 9    10 dtype: object  in [119]: s.rolling(3).mean() out[119]: 0    nan 1    nan 2    2.0 3    3.0 4    4.0 5    5.0 6    6.0 7    7.0 8    8.0 9    9.0 dtype: float64

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