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  • aulemahal · 1 ✖

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  • Implement polyfit? · 1 ✖

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  • CONTRIBUTOR · 1 ✖
id html_url issue_url node_id user created_at updated_at ▲ author_association body reactions performed_via_github_app issue
581584469 https://github.com/pydata/xarray/issues/3349#issuecomment-581584469 https://api.github.com/repos/pydata/xarray/issues/3349 MDEyOklzc3VlQ29tbWVudDU4MTU4NDQ2OQ== aulemahal 20629530 2020-02-03T19:43:53Z 2020-02-03T19:43:53Z CONTRIBUTOR

I pushed a new PR trying to implement polyfit in xarray, #3733. It is still work in progress, but I would like the opinion on those who participated in this thread.

Considering all options discussed in the thread, I chose an implementation that seemed to give the best performance and generality (skipping NaN values), but it duplicates a lot of code from numpy.polyfit.

Main question:

  • Should xarray's implementation really replicate the behaviour of numpy's?

A lot of extra code could be removed if we'd say we only want to compute and return the residuals and the coefficients. All the other variables are a few lines of code away for the user that really wants them, and they don't need the power of xarray and dask anyway.

I'm guessing @huard @dcherian @rabernat and @shoyer might have comments.

 
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   Implement polyfit? 499477363

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