{"action":"created","issue":{"url":"https://api.github.com/repos/MDAnalysis/mdanalysis/issues/539","labels_url":"https://api.github.com/repos/MDAnalysis/mdanalysis/issues/539/labels{/name}","comments_url":"https://api.github.com/repos/MDAnalysis/mdanalysis/issues/539/comments","events_url":"https://api.github.com/repos/MDAnalysis/mdanalysis/issues/539/events","html_url":"https://github.com/MDAnalysis/mdanalysis/issues/539","id":116628277,"number":539,"title":"NCDFReader has no attribute skip","user":{"login":"casawa","id":9159750,"avatar_url":"https://avatars.githubusercontent.com/u/9159750?v=3","gravatar_id":"","url":"https://api.github.com/users/casawa","html_url":"https://github.com/casawa","followers_url":"https://api.github.com/users/casawa/followers","following_url":"https://api.github.com/users/casawa/following{/other_user}","gists_url":"https://api.github.com/users/casawa/gists{/gist_id}","starred_url":"https://api.github.com/users/casawa/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/casawa/subscriptions","organizations_url":"https://api.github.com/users/casawa/orgs","repos_url":"https://api.github.com/users/casawa/repos","events_url":"https://api.github.com/users/casawa/events{/privacy}","received_events_url":"https://api.github.com/users/casawa/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"milestone":null,"comments":4,"created_at":"2015-11-12T19:59:08Z","updated_at":"2015-11-16T21:58:57Z","closed_at":null,"body":"I'm trying to use the density analysis on an AMBER Trajectory.\r\n\r\nI run the following:\r\nu = Universe(PDB, NCTrajectory)\r\nD = density_from_Universe(u, delta=1.0, atomselection=\"name OH2\")\r\n\r\nThen, it histograms all the frames, and at the last frame, it says:\r\nAttributeError: 'NCDFReader' object has no attribute 'skip'"},"comment":{"url":"https://api.github.com/repos/MDAnalysis/mdanalysis/issues/comments/157183784","html_url":"https://github.com/MDAnalysis/mdanalysis/issues/539#issuecomment-157183784","issue_url":"https://api.github.com/repos/MDAnalysis/mdanalysis/issues/539","id":157183784,"user":{"login":"orbeckst","id":237980,"avatar_url":"https://avatars.githubusercontent.com/u/237980?v=3","gravatar_id":"","url":"https://api.github.com/users/orbeckst","html_url":"https://github.com/orbeckst","followers_url":"https://api.github.com/users/orbeckst/followers","following_url":"https://api.github.com/users/orbeckst/following{/other_user}","gists_url":"https://api.github.com/users/orbeckst/gists{/gist_id}","starred_url":"https://api.github.com/users/orbeckst/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/orbeckst/subscriptions","organizations_url":"https://api.github.com/users/orbeckst/orgs","repos_url":"https://api.github.com/users/orbeckst/repos","events_url":"https://api.github.com/users/orbeckst/events{/privacy}","received_events_url":"https://api.github.com/users/orbeckst/received_events","type":"User","site_admin":false},"created_at":"2015-11-16T21:58:57Z","updated_at":"2015-11-16T21:58:57Z","body":"Hi Chaitanya,\n\nWould you mind opening a new issue for the problem with density_from_Universe() (and close #539)? This would very much help us to keep track of things and also focuses work on particular problems.\n\nmany thanks,\nOliver\n\nOn 16 Nov, 2015, at 11:06, Chaitanya Asawa wrote:\n\n> Thanks! I had to set a few more attributes as well, so I do something like this now:\n> \n> u = Universe(PDB, NC file)\n> u.trajectory.skip = 1\n> u.trajectory.skip_timestep = 1\n> u.trajectory.delta = 1\n> D = density_from_Universe(u, delta=1.0, atomselection=\"name OH2\")\n> \n> Then, while exporting to a DX file, I get the following error: NotImplementedError: Only regularly spaced grids allowed.\n> \n> I set delta to be 1.0, so I was confused why this wouldn't be regularly spaced?\n> \n\n"}}