issues: 1363366455

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id node_id number title user state locked assignee milestone comments created_at updated_at closed_at author_association active_lock_reason draft pull_request body reactions performed_via_github_app state_reason repo type
1363366455 I_kwDOAMm_X85RQ1I3 6997 `ffill` does not spread chunks when used with dask.array 17484729 closed 0     5 2022-09-06T14:20:29Z 2022-09-08T15:42:57Z 2022-09-08T15:42:57Z NONE      

What is your issue?

When using xarray with dask.array as in the following example: import numpy as np import xarray as xr import dask ds_ = xr.Dataset() ds_["test"] = ("dim_0",), dask.array.from_array( [0, 1, np.nan, np.nan, np.nan], chunks=2 ) then the ffill method does not seem to propagate through the underlying chunks used by dask.array. In the example above, this means that ds_.ffill("dim_0").compute().test.values gives ```

array([ 0., 1., 1., 1., nan]) where ds_.compute().ffill("dim_0").test.values gives array([0., 1., 1., 1., 1., 1.]) ```

Is it an expected behavior ?

 
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   completed 13221727 issue

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