html_url,issue_url,id,node_id,user,created_at,updated_at,author_association,body,reactions,performed_via_github_app,issue
https://github.com/pydata/xarray/issues/1142#issuecomment-263751396,https://api.github.com/repos/pydata/xarray/issues/1142,263751396,MDEyOklzc3VlQ29tbWVudDI2Mzc1MTM5Ng==,2443309,2016-11-30T01:04:21Z,2016-11-30T01:10:24Z,MEMBER,"Certainly open to adding this functionality.  Bottleneck isn't going to help so the code will all live in xarray. I think it makes sense to have a bit of a design discussion here prior to getting started. Questions:

#### 1. What window types are you interested in adding?  Pandas includes:

- boxcar
- triang
- blackman
- hamming
- bartlett
- parzen
- bohman
- blackmanharris
- nuttall
- barthann
- kaiser (needs beta)
- gaussian (needs std)
- general_gaussian (needs power, width)
- slepian (needs width)

#### 2. Can we maintain compatibility with pandas and bottleneck.

We have tried to maintain compatibility with both pandas and bottleneck in our rolling implementation.  This is proving somewhat difficult (e.g. #1046) but is a design consideration that we should keep in mind. 

Also, our current implementation falls back to operating on individual slices of the DataArray when bottleneck cannot be utilized. We should think a bit about the applicability of other windows when using other window types. Presumably, each `win_type` listed above would just provide a different set of weights to be associated with the members of each window.

#### 3. What about nd windows?

Our current implementation left open the possibility of n-dimensional windows (see #819).  While we haven't implemented it yet, the utility of the rolling object for a 2+ dimensional smoother would be quite a nice feature. That said, I'd be hesitant to implement anything on the rolling object that would not allow us to make this addition in the future.","{""total_count"": 1, ""+1"": 1, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,192248351
https://github.com/pydata/xarray/issues/1142#issuecomment-263678778,https://api.github.com/repos/pydata/xarray/issues/1142,263678778,MDEyOklzc3VlQ29tbWVudDI2MzY3ODc3OA==,5635139,2016-11-29T19:50:08Z,2016-11-29T19:50:08Z,MEMBER,"Think it would be useful generally. @jhamman will have a better view of how difficult it is to implement. Our use cases are fine with simple windows, although an `ewm` object would be helpful.

One API choice is to what extent we want `.rolling`, `.expanding` & `.ewm` to be separate objects vs kwargs to `.rolling`","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,192248351
https://github.com/pydata/xarray/issues/1142#issuecomment-263642547,https://api.github.com/repos/pydata/xarray/issues/1142,263642547,MDEyOklzc3VlQ29tbWVudDI2MzY0MjU0Nw==,1217238,2016-11-29T17:41:53Z,2016-11-29T17:41:53Z,MEMBER,"There are no immediate plans that I know of, but I think we are certainly open to adding this functionality if someone wants to look into it.

cc @jhamman @MaximilianR ","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,192248351