issue_comments: 789599056
This data as json
| html_url | issue_url | id | node_id | user | created_at | updated_at | author_association | body | reactions | performed_via_github_app | issue |
|---|---|---|---|---|---|---|---|---|---|---|---|
| https://github.com/pydata/xarray/pull/4979#issuecomment-789599056 | https://api.github.com/repos/pydata/xarray/issues/4979 | 789599056 | MDEyOklzc3VlQ29tbWVudDc4OTU5OTA1Ng== | 10194086 | 2021-03-03T10:11:43Z | 2021-03-03T10:11:43Z | MEMBER | One thing I did not see discussed is alignment (or did I miss this?). Currently alignment is based on the "indexes" or well I guess One (potential) edge case are
```python
import xarray as xr
da1 = xr.DataArray([1, 2, 3], dims="x", coords=dict(time=("x", [1, 2, 3]), exp=("x", ["a", "a", "b"])))
da2 = xr.DataArray([2, 3, 4], dims="x", coords=dict(time=("x", [1, 2, 3]), exp=("x", ["a", "a", "a"])))
da1 = da1.set_index(x=("time", "exp"))
da2 = da2.set_index(x=("time", "exp"))
da1 + da2
```
```python
<xarray.DataArray (x: 2)>
array([3, 5])
Coordinates:
* x (x) MultiIndex
- time (x) int64 1 2
- exp (x) object 'a' 'a'
```
|
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