How to sum up a sequence of value in 3 records span?

Asked Feb 21 '18 at 05:10

Active Feb 21 '18 at 05:14

Viewed 41 times

Sorry for my broken English, I know the title is weird. But I want to do is like below.
Let' s say I have a Series

pd.Series([1,3,2,1,4,3])

0    1
1    3
2    2
3    1
4    4
5    3
dtype: int64

I want to add each record with the former 2 records and get the Series below.
For instance, for 5th record, the new value 8 = 1 + 4 + 3.

0    1
1    4
2    6
3    6
4    7
5    8
dtype: int64

asked Feb 21 '18 at 05:10

Dawei

1

I mean, if you have a gold badge you could just hammer the question. – cs95 Feb 21 '18 at 05:19
@cᴏʟᴅsᴘᴇᴇᴅ If I had known the term "rolling window", I would not ask this question. – Dawei Feb 22 '18 at 12:08
Sorry, the comment was meant for someone else who deleted. – cs95 Feb 22 '18 at 16:46

0 Answers0