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/7840#issuecomment-1546028265,https://api.github.com/repos/pydata/xarray/issues/7840,1546028265,IC_kwDOAMm_X85cJoTp,14808389,2023-05-12T16:56:23Z,2023-05-12T16:56:23Z,MEMBER,"let's have a look at what defines the object:
```python
data = xr.DataArray(np.random.randn(2, 3), dims=(""x"", ""y""), coords={""x"": [10, 20]})
```
That means we have:
- random data
- two dimensions: x with a length of 2 and y with a length of 3
- one coordinate: x with values `[10, 20]`

The line
```python
data.x.attrs[""units""] = ""x units""
```
can be split into two parts:
```python
x = data.x
```
and
```python
x.attrs[""units""] = ""x units""
```
where `x` is the coordinate.

If we did the same thing with `y` we would *not* get the dimension, but a dummy coordinate that has the values `np.arange(data.sizes[""y""])`. This is admittedly a bit confusing.","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,1707774178
https://github.com/pydata/xarray/pull/7840#issuecomment-1545937746,https://api.github.com/repos/pydata/xarray/issues/7840,1545937746,IC_kwDOAMm_X85cJSNS,14808389,2023-05-12T15:37:59Z,2023-05-12T15:37:59Z,MEMBER,"I agree, coordinate is the correct term. We could make that a bit less confusing by using a non-dimension coordinate in the example, but then again the point is that any coordinate can have additional metadata.

> But I think the concept of dimension-coordinates (when the coordinate has the same name as the dimension) is still relevant.

If I remember correctly, while they lost their status as the only ones having an index dimension coordinates are still used for alignment.","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,1707774178