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/5629#issuecomment-961349927,https://api.github.com/repos/pydata/xarray/issues/5629,961349927,IC_kwDOAMm_X845TQkn,35968931,2021-11-04T19:25:41Z,2021-11-04T19:26:51Z,MEMBER,"> I was thinking the general idea of reshape_block seems like a clever trick to get around the apply_ufunc constraints and could be used for some other functions as well. But maybe there aren't that many functions that could make use of it.

The idea seems similar to [what we used in xhistogram](https://github.com/xgcm/xhistogram/pull/49), which uses blockwise to apply a function that reshapes the data in that block to be 1D.

EDIT: But in that case our algorithm was one that could be applied blockwise, `apply_ufunc` was not used.","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,950882492
https://github.com/pydata/xarray/issues/5629#issuecomment-961187488,https://api.github.com/repos/pydata/xarray/issues/5629,961187488,IC_kwDOAMm_X845So6g,35968931,2021-11-04T16:04:17Z,2021-11-04T16:04:17Z,MEMBER,"> The problem is that there is no general solution here. You have to write a chunk-aware function and then use apply_ufunc(..., dask=""allowed""). This suggestion only works because dask's lstsq can work with chunked dimensions.

Sorry, what case does your suggestion not handle? It would be really nice to support chunked core dims if we are going to the effort of rewriting polyfit.","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,950882492
https://github.com/pydata/xarray/issues/5629#issuecomment-885087800,https://api.github.com/repos/pydata/xarray/issues/5629,885087800,IC_kwDOAMm_X840wV44,35968931,2021-07-22T17:31:02Z,2021-07-22T17:31:58Z,MEMBER,"Thanks for the clear example @jbusecke . I think your example is helpful enough that we should keep this open (even if the same PR will hopefully close both this and #4554)

Was about to say the same @dcherian! @aulemahal what do you think about how easy it might be to change `polyfit` to use `apply_ufunc`?","{""total_count"": 1, ""+1"": 1, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,950882492