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/2035#issuecomment-378123622,https://api.github.com/repos/pydata/xarray/issues/2035,378123622,MDEyOklzc3VlQ29tbWVudDM3ODEyMzYyMg==,5635139,2018-04-03T04:19:37Z,2018-04-03T04:19:37Z,MEMBER,"Because it's doing `3.0 - 3.0`? Or am I misunderstanding something? Try taking a single x & y slice and looking at the input & the output","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,310670696 https://github.com/pydata/xarray/issues/2035#issuecomment-378119865,https://api.github.com/repos/pydata/xarray/issues/2035,378119865,MDEyOklzc3VlQ29tbWVudDM3ODExOTg2NQ==,5635139,2018-04-03T03:49:41Z,2018-04-03T03:49:41Z,MEMBER,Right - it's aligning on the intersection of the overlapping coords - in this case the `z` dim goes from len=4 to len=3,"{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,310670696