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/2307#issuecomment-407409837,https://api.github.com/repos/pydata/xarray/issues/2307,407409837,MDEyOklzc3VlQ29tbWVudDQwNzQwOTgzNw==,41115380,2018-07-24T13:38:56Z,2018-07-24T13:38:56Z,NONE,@fmaussion thank you! Think I got a bit confused ,"{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,344019665 https://github.com/pydata/xarray/issues/2307#issuecomment-407400661,https://api.github.com/repos/pydata/xarray/issues/2307,407400661,MDEyOklzc3VlQ29tbWVudDQwNzQwMDY2MQ==,10050469,2018-07-24T13:10:23Z,2018-07-24T13:10:23Z,MEMBER,"Hi @ameanijon , for me it's not clear what you mean with ""specify longitude"" in your post above. The command ``u.where(u.longitude >= 30)`` will mask out data, not select (or ""pick"") them as you write in your title. Selecting data is called ""indexing"" in xarray and you'll find examples in the documentation here: http://xarray.pydata.org/en/stable/indexing.html (also with time) ","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,344019665