{"action":"opened","issue":{"url":"https://api.github.com/repos/christophergandrud/DataCombine/issues/7","labels_url":"https://api.github.com/repos/christophergandrud/DataCombine/issues/7/labels{/name}","comments_url":"https://api.github.com/repos/christophergandrud/DataCombine/issues/7/comments","events_url":"https://api.github.com/repos/christophergandrud/DataCombine/issues/7/events","html_url":"https://github.com/christophergandrud/DataCombine/issues/7","id":54417802,"number":7,"title":"data.table issues","user":{"login":"zeltak","id":498410,"avatar_url":"https://avatars.githubusercontent.com/u/498410?v=3","gravatar_id":"","url":"https://api.github.com/users/zeltak","html_url":"https://github.com/zeltak","followers_url":"https://api.github.com/users/zeltak/followers","following_url":"https://api.github.com/users/zeltak/following{/other_user}","gists_url":"https://api.github.com/users/zeltak/gists{/gist_id}","starred_url":"https://api.github.com/users/zeltak/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/zeltak/subscriptions","organizations_url":"https://api.github.com/users/zeltak/orgs","repos_url":"https://api.github.com/users/zeltak/repos","events_url":"https://api.github.com/users/zeltak/events{/privacy}","received_events_url":"https://api.github.com/users/zeltak/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"milestone":null,"comments":0,"created_at":"2015-01-15T06:42:43Z","updated_at":"2015-01-15T06:42:43Z","closed_at":null,"body":"Hi!\r\n\r\nFirst of all thanks so much for this fantastic package! its a lifesaver for me :)\r\n\r\ni have one question. i cant seem to get it to work with data.table at all.  this is the syntax i try to run:\r\n\r\n#sort PM data\r\nsetkey(m9x,aodid,day)\r\n# next day PM\r\nData1 <- slide(m9x, Var = \"aod\", GroupVar = \"aodid\",\r\n               slideBy = 1)\r\n#prev day PM \r\nData2 <- slide(Data1, Var = \"aod\", GroupVar = \"aodid\",\r\n               slideBy = -1)\r\n\r\n\r\nthis wont run but if i convert it to DF from DT and run it it works very well. any ideas?\r\n\r\nthx again!\r\n\r\nz."}}