{"action":"created","issue":{"url":"https://api.github.com/repos/mlr-org/mlr/issues/894","repository_url":"https://api.github.com/repos/mlr-org/mlr","labels_url":"https://api.github.com/repos/mlr-org/mlr/issues/894/labels{/name}","comments_url":"https://api.github.com/repos/mlr-org/mlr/issues/894/comments","events_url":"https://api.github.com/repos/mlr-org/mlr/issues/894/events","html_url":"https://github.com/mlr-org/mlr/issues/894","id":154996426,"number":894,"title":"Is it possible to apply bagging only to one class?","user":{"login":"enricoferrero","id":4481814,"avatar_url":"https://avatars.githubusercontent.com/u/4481814?v=3","gravatar_id":"","url":"https://api.github.com/users/enricoferrero","html_url":"https://github.com/enricoferrero","followers_url":"https://api.github.com/users/enricoferrero/followers","following_url":"https://api.github.com/users/enricoferrero/following{/other_user}","gists_url":"https://api.github.com/users/enricoferrero/gists{/gist_id}","starred_url":"https://api.github.com/users/enricoferrero/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/enricoferrero/subscriptions","organizations_url":"https://api.github.com/users/enricoferrero/orgs","repos_url":"https://api.github.com/users/enricoferrero/repos","events_url":"https://api.github.com/users/enricoferrero/events{/privacy}","received_events_url":"https://api.github.com/users/enricoferrero/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"milestone":null,"comments":2,"created_at":"2016-05-16T09:51:09Z","updated_at":"2016-05-23T07:46:49Z","closed_at":null,"body":"I'm working on a [PU learning](https://en.wikipedia.org/wiki/One-class_classification) problem.\r\nI would like to apply bagging only to the unlabelled class, but not to the positive class, as described in [this paper](http://arxiv.org/abs/1402.3144), section 2.2.\r\n\r\nIs this possible within the mlr framework? How?\r\n\r\nThank you,"},"comment":{"url":"https://api.github.com/repos/mlr-org/mlr/issues/comments/220909425","html_url":"https://github.com/mlr-org/mlr/issues/894#issuecomment-220909425","issue_url":"https://api.github.com/repos/mlr-org/mlr/issues/894","id":220909425,"user":{"login":"enricoferrero","id":4481814,"avatar_url":"https://avatars.githubusercontent.com/u/4481814?v=3","gravatar_id":"","url":"https://api.github.com/users/enricoferrero","html_url":"https://github.com/enricoferrero","followers_url":"https://api.github.com/users/enricoferrero/followers","following_url":"https://api.github.com/users/enricoferrero/following{/other_user}","gists_url":"https://api.github.com/users/enricoferrero/gists{/gist_id}","starred_url":"https://api.github.com/users/enricoferrero/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/enricoferrero/subscriptions","organizations_url":"https://api.github.com/users/enricoferrero/orgs","repos_url":"https://api.github.com/users/enricoferrero/repos","events_url":"https://api.github.com/users/enricoferrero/events{/privacy}","received_events_url":"https://api.github.com/users/enricoferrero/received_events","type":"User","site_admin":false},"created_at":"2016-05-23T07:46:49Z","updated_at":"2016-05-23T07:46:49Z","body":"The problem I see with this is that in my case the class that I want to apply bagging to (the unlabelled cases) is the majority class. So i would need to apply oversampling to the majority class - I'm not entirely sure it makes sense to do that?"}}
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