{"action":"created","issue":{"url":"https://api.github.com/repos/biocore/scikit-bio/issues/879","labels_url":"https://api.github.com/repos/biocore/scikit-bio/issues/879/labels{/name}","comments_url":"https://api.github.com/repos/biocore/scikit-bio/issues/879/comments","events_url":"https://api.github.com/repos/biocore/scikit-bio/issues/879/events","html_url":"https://github.com/biocore/scikit-bio/pull/879","id":63125944,"number":879,"title":"Additional decomposition methods and approximate PCoA","user":{"login":"wasade","id":474290,"avatar_url":"https://avatars.githubusercontent.com/u/474290?v=3","gravatar_id":"","url":"https://api.github.com/users/wasade","html_url":"https://github.com/wasade","followers_url":"https://api.github.com/users/wasade/followers","following_url":"https://api.github.com/users/wasade/following{/other_user}","gists_url":"https://api.github.com/users/wasade/gists{/gist_id}","starred_url":"https://api.github.com/users/wasade/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/wasade/subscriptions","organizations_url":"https://api.github.com/users/wasade/orgs","repos_url":"https://api.github.com/users/wasade/repos","events_url":"https://api.github.com/users/wasade/events{/privacy}","received_events_url":"https://api.github.com/users/wasade/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"milestone":null,"comments":15,"created_at":"2015-03-20T00:37:28Z","updated_at":"2015-03-25T01:35:05Z","closed_at":null,"pull_request":{"url":"https://api.github.com/repos/biocore/scikit-bio/pulls/879","html_url":"https://github.com/biocore/scikit-bio/pull/879","diff_url":"https://github.com/biocore/scikit-bio/pull/879.diff","patch_url":"https://github.com/biocore/scikit-bio/pull/879.patch"},"body":"**DO NOT MERGE**\r\n\r\n**NOT READY FOR REVIEW**\r\n\r\nLaying out the initial proposed changed to the PCoA object to support changing the eigen decomposition used as well as supporting approximate PCoA methods. The approximate methods do not actually do a eigen decomposition, and there isn't (AFAIK) and analog to eigenvalues and proportion explained hence the need to be able to redefine the `scores` method. However, the scores method is potentially dependent on the decomposition being done, so the present structure may not be sufficient \r\n\r\nSpecific examples of the methods being ported can be found [here](https://github.com/pycogent/pycogent/compare/master...antgonza:principal_coordinates_new_methods). \r\ncc @antgonza @Jorge-C @mortonjt  \r\n\r\nTo clarify, much of the documentation and methods being merged in were originally implemented by @antgonza and others. The primary source for all this can be found [here](https://github.com/pycogent/pycogent/compare/master...antgonza:principal_coordinates_new_methods)."},"comment":{"url":"https://api.github.com/repos/biocore/scikit-bio/issues/comments/85774933","html_url":"https://github.com/biocore/scikit-bio/pull/879#issuecomment-85774933","issue_url":"https://api.github.com/repos/biocore/scikit-bio/issues/879","id":85774933,"user":{"login":"gregcaporaso","id":192372,"avatar_url":"https://avatars.githubusercontent.com/u/192372?v=3","gravatar_id":"","url":"https://api.github.com/users/gregcaporaso","html_url":"https://github.com/gregcaporaso","followers_url":"https://api.github.com/users/gregcaporaso/followers","following_url":"https://api.github.com/users/gregcaporaso/following{/other_user}","gists_url":"https://api.github.com/users/gregcaporaso/gists{/gist_id}","starred_url":"https://api.github.com/users/gregcaporaso/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/gregcaporaso/subscriptions","organizations_url":"https://api.github.com/users/gregcaporaso/orgs","repos_url":"https://api.github.com/users/gregcaporaso/repos","events_url":"https://api.github.com/users/gregcaporaso/events{/privacy}","received_events_url":"https://api.github.com/users/gregcaporaso/received_events","type":"User","site_admin":false},"created_at":"2015-03-25T01:35:05Z","updated_at":"2015-03-25T01:35:05Z","body":"Awesome, thanks @wasade. Looking forward to seeing the results.\r\n\r\nI'll let @jairideout answer your question about the scope of this PR as he's been more closely involved with it than I have. "}}