issue_comments: 555526229

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https://github.com/pydata/xarray/issues/3546#issuecomment-555526229 https://api.github.com/repos/pydata/xarray/issues/3546 555526229 MDEyOklzc3VlQ29tbWVudDU1NTUyNjIyOQ== 10194086 2019-11-19T14:15:36Z 2019-11-19T14:15:36Z MEMBER

I think .loc does not take a boolean array for selection but the actual lon values you want to select. To select with a boolean array you would do:

python sel = da[0, 0] < mask da[0, 0][sel] If you want to use .loc you first need to get the longitude values to select by:

``` python sel_lon = da[0, 0].lon[sel] da[0, 0].loc[sel_lon]

```

 
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