issue_comments: 904578829

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https://github.com/pydata/xarray/issues/5727#issuecomment-904578829 https://api.github.com/repos/pydata/xarray/issues/5727 904578829 IC_kwDOAMm_X8416scN 4160723 2021-08-24T12:05:44Z 2021-08-24T12:05:44Z MEMBER

With da.loc[{'x':~mask}], you're actually doing label-based indexing, so ~mask will select repeatedly the items for which x=1.0 (True) and x=0.0 (False):

```python

da.loc[{'x':~mask}] <xarray.DataArray (x: 10)> array([1., 0., 1., 0., 1., 0., 1., 0., 1., 0.]) Coordinates: * x (x) float64 1.0 0.0 1.0 0.0 1.0 0.0 1.0 0.0 1.0 0.0 ```

What you want is integer-based indexing (i.e., not using .loc):

```python

da[{'x':~mask}] <xarray.DataArray (x: 5)> array([0., 2., 4., 6., 8.]) Coordinates: * x (x) float64 0.0 2.0 4.0 6.0 8.0 ```

doc link.

 
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