issues: 318237397

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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
318237397 MDExOlB1bGxSZXF1ZXN0MTg0NDk1MDI4 2087 Drop conflicted coordinate when assignment. 6815844 closed 0     1 2018-04-27T00:12:43Z 2018-05-02T05:58:41Z 2018-05-02T02:31:02Z MEMBER   0 pydata/xarray/pulls/2087
  • [x] Closes #2068
  • [x] Tests added
  • [x] Tests passed
  • [x] Fully documented, including whats-new.rst for all changes and api.rst for new API (remove if this change should not be visible to users, e.g., if it is an internal clean-up, or if this is part of a larger project that will be documented later)

After this, when assigning a dataarray to a dataset, non-dimensional and conflicted coordinates of the dataarray are dropped.

example ``` In [2]: ds = xr.Dataset({'da': ('x', [0, 1, 2])}, ...: coords={'y': (('x',), [0.1, 0.2, 0.3])}) ...: ds ...: Out[2]: <xarray.Dataset> Dimensions: (x: 3) Coordinates: y (x) float64 0.1 0.2 0.3 Dimensions without coordinates: x Data variables: da (x) int64 0 1 2

In [3]: other = ds['da'] ...: other['y'] = 'x', [0, 1, 2] # conflicted non-dimensional coordinate ...: ds['da'] = other ...: ds ...: Out[3]: <xarray.Dataset> Dimensions: (x: 3) Coordinates: y (x) float64 0.1 0.2 0.3 # 'y' is not overwritten Dimensions without coordinates: x Data variables: da (x) int64 0 1 2 ```

 
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