issue_comments: 322894661

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/issues/1509#issuecomment-322894661 https://api.github.com/repos/pydata/xarray/issues/1509 322894661 MDEyOklzc3VlQ29tbWVudDMyMjg5NDY2MQ== 2443309 2017-08-16T20:48:16Z 2017-08-16T20:48:16Z MEMBER

1) I can reproduce this behavior on the current master branch 2) this is consistent with numpy's nansum/nanmean which we use here

```python In [1]: import numpy as np

In [2]: np.sum([np.nan]) Out[2]: nan

In [3]: np.mean([np.nan]) Out[3]: nan

In [4]: np.nansum([np.nan]) Out[4]: 0.0

In [5]: np.nanmean([np.nan]) /glade/u/home/jhamman/anaconda/envs/storylines/bin/ipython:1: RuntimeWarning: Mean of empty slice #!/glade/u/home/jhamman/anaconda/envs/storylines/bin/python Out[5]: nan ```

 
{
    "total_count": 0,
    "+1": 0,
    "-1": 0,
    "laugh": 0,
    "hooray": 0,
    "confused": 0,
    "heart": 0,
    "rocket": 0,
    "eyes": 0
}
   250751931