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/3641#issuecomment-567738254,https://api.github.com/repos/pydata/xarray/issues/3641,567738254,MDEyOklzc3VlQ29tbWVudDU2NzczODI1NA==,24830983,2019-12-20T00:37:01Z,2019-12-20T00:44:45Z,NONE,"I wanted to bring attention to a package that we are working on that originally started with remapping time axis. The package is called AxisUtilities and is available at https://github.com/coderepocenter/AxisUtilities.

It doesn’t yet have any support for CFTime yet (well it does support it now; but you need to manually convert cftime to a number for now) But we are working on it (so that the cftime to number conversion is more automatic). We have the basis there. We are now working on it to make it easier to use and remove certain steps.

It follows the ESMF or SCRIP interpolation pattern, i.e. once you make the remapper object, you could use it for multiple data set as long as the source and destination axis has not changed.

","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,539648897
https://github.com/pydata/xarray/issues/3349#issuecomment-566132726,https://api.github.com/repos/pydata/xarray/issues/3349,566132726,MDEyOklzc3VlQ29tbWVudDU2NjEzMjcyNg==,24830983,2019-12-16T16:21:18Z,2019-12-16T16:21:18Z,NONE,"> @maboualidev Is your objective to integrate the GeoCat implementation into xarray or keep it standalone ?

[GeoCAT](https://geocat.ucar.edu) is the python version of [NCL](https://www.ncl.ucar.edu) and we are a team at [NCAR](https://ncar.ucar.edu) working on it. I know that the team decision is to make use of Xarray within GeoCAT as much as possible, though. 

","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,499477363
https://github.com/pydata/xarray/issues/3349#issuecomment-565738511,https://api.github.com/repos/pydata/xarray/issues/3349,565738511,MDEyOklzc3VlQ29tbWVudDU2NTczODUxMQ==,24830983,2019-12-14T17:58:34Z,2019-12-14T18:00:08Z,NONE,"Hi @huard Thanks for the reply.

Regarding:

> There does not seem to be matching polyval implementations for any of those nor support for indexing along a time dimension with a non-standard calendar.

There is a pull request on GeoCAT-comp for [ndpolyval](https://github.com/NCAR/geocat-comp/pull/49). I think `polyval` and `polyfit` go hand-in-hand. If we have `ndpolyfit` there must be a also a `ndpolyval`. 

Regarding:

> I see you're storing the residuals in the DataArray attributes. From my perspective, it would be useful to have those directly as DataArrays. Thoughts ?

I see the point and agree with you. I think it is a good idea to be as similar to `NumPy.polyfit` as possible; even for the style of the output. I will see it through to have that changed in GeoCAT.


attn: @clyne and @khallock","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,499477363
https://github.com/pydata/xarray/issues/3349#issuecomment-565675452,https://api.github.com/repos/pydata/xarray/issues/3349,565675452,MDEyOklzc3VlQ29tbWVudDU2NTY3NTQ1Mg==,24830983,2019-12-14T03:01:44Z,2019-12-14T03:03:14Z,NONE,"[geocat.comp.ndpolyfit](https://geocat-comp.readthedocs.io/en/latest/user_api/generated/geocat.comp.ndpolyfit.html#geocat.comp.ndpolyfit) extends `NumPy.polyfit` for multi-dimensional arrays and has support for Xarray and Dask. It does exactly what is requested here.

regards,

@andersy005 @clyne @matt-long @khallock","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,499477363