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/issues/1949#issuecomment-424014244,https://api.github.com/repos/pydata/xarray/issues/1949,424014244,MDEyOklzc3VlQ29tbWVudDQyNDAxNDI0NA==,10946756,2018-09-24T15:21:41Z,2018-09-24T15:50:19Z,NONE,"So does this mean that the following line in the docs is now false: ""If a dimension name is given as an argument to drop, it also drops all variables that use that dimension""

This is at http://xarray.pydata.org/en/stable/data-structures.html#dataarray.

It does not seem to work as advertised. Before drop:

```
<xarray.Dataset>
Dimensions:      (Frequency: 2000, Index: 1, Power: 1, Temperature: 1)
Coordinates:
  * Power        (Power) float64 -117.0
  * Temperature  (Temperature) float64 1.16
  * Index        (Index) int64 0
  * Frequency    (Frequency) float64 3.865e+09 3.865e+09 3.865e+09 3.865e+09 ...
Data variables:
    I            (Power, Temperature, Index, Frequency) float64 ...
    Q            (Power, Temperature, Index, Frequency) float64 ...
    Time         (Power, Temperature, Index) datetime64[ns] ...
```

Then I call `ds.drop('Frequency')`, expecting that this will kill off the Frequency dimension, coordinate, and the `I` and `Q` variables, since they depend on Frequency, but what I get is:

```
<xarray.Dataset>
Dimensions:      (Frequency: 2000, Index: 1, Power: 1, Temperature: 1)
Coordinates:
  * Power        (Power) float64 -117.0
  * Temperature  (Temperature) float64 1.16
  * Index        (Index) int64 0
Dimensions without coordinates: Frequency
Data variables:
    I            (Power, Temperature, Index, Frequency) float64 ...
    Q            (Power, Temperature, Index, Frequency) float64 ...
    Time         (Power, Temperature, Index) datetime64[ns] ...
```

If I then try dropping Frequency again, it complains that there are no variables named 'Frequency'. So probably this issue should include an update to the documentation. Or maybe that should be a new issue.","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,301031693