issues: 1217566173

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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
1217566173 I_kwDOAMm_X85IkpXd 6528 cumsum drops index coordinates 2448579 open 0     5 2022-04-27T16:04:08Z 2023-09-22T07:55:56Z   MEMBER      

What happened?

cumsum drops index coordinates. Seen in #6525, #3417

What did you expect to happen?

Preserve index coordinates

Minimal Complete Verifiable Example

```Python import xarray as xr

ds = xr.Dataset( {"foo": (("x",), [7, 3, 1, 1, 1, 1, 1])}, coords={"x": [0, 1, 2, 3, 4, 5, 6]}, ) ds.cumsum("x") ```

<xarray.Dataset> Dimensions: (x: 7) Dimensions without coordinates: x Data variables: foo (x) int64 7 10 11 12 13 14 15

Relevant log output

No response

Anything else we need to know?

No response

Environment

xarray main 
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     13221727 issue

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