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  • rolling.construct alignment · 2 ✖

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id html_url issue_url node_id user created_at updated_at ▲ author_association body reactions performed_via_github_app issue
573270896 https://github.com/pydata/xarray/issues/3671#issuecomment-573270896 https://api.github.com/repos/pydata/xarray/issues/3671 MDEyOklzc3VlQ29tbWVudDU3MzI3MDg5Ng== fujiisoup 6815844 2020-01-11T02:24:19Z 2020-01-11T02:24:19Z MEMBER

But I mistakenly thought that there was a performance penalty to doing this.

Yes, construct(stride=2) does exactly the same thing before returning an array. https://github.com/pydata/xarray/blob/ff75081304eb2e2784dcb229cc48a532da557896/xarray/core/rolling.py#L242

 
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   rolling.construct alignment 546791416
572718436 https://github.com/pydata/xarray/issues/3671#issuecomment-572718436 https://api.github.com/repos/pydata/xarray/issues/3671 MDEyOklzc3VlQ29tbWVudDU3MjcxODQzNg== fujiisoup 6815844 2020-01-09T19:32:29Z 2020-01-09T19:32:29Z MEMBER

Hi @mark-boer for raising an issue. I am not sure if I got the point exactly, but the following is similar to what you want? python In [81]: arr = xr.DataArray(np.arange(4), dims=("x",)) ...: arr.rolling(x=2).construct("roll_x").isel(x=slice(1, None, 2)) Out[81]: <xarray.DataArray (x: 2, roll_x: 2)> array([[0., 1.], [2., 3.]]) Dimensions without coordinates: x, roll_x

 
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   rolling.construct alignment 546791416

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