{"action":"created","issue":{"url":"https://api.github.com/repos/fchollet/keras/issues/395","labels_url":"https://api.github.com/repos/fchollet/keras/issues/395/labels{/name}","comments_url":"https://api.github.com/repos/fchollet/keras/issues/395/comments","events_url":"https://api.github.com/repos/fchollet/keras/issues/395/events","html_url":"https://github.com/fchollet/keras/issues/395","id":95211755,"number":395,"title":"is the Sequence to Sequence learning right?","user":{"login":"EderSantana","id":3902480,"avatar_url":"https://avatars.githubusercontent.com/u/3902480?v=3","gravatar_id":"","url":"https://api.github.com/users/EderSantana","html_url":"https://github.com/EderSantana","followers_url":"https://api.github.com/users/EderSantana/followers","following_url":"https://api.github.com/users/EderSantana/following{/other_user}","gists_url":"https://api.github.com/users/EderSantana/gists{/gist_id}","starred_url":"https://api.github.com/users/EderSantana/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/EderSantana/subscriptions","organizations_url":"https://api.github.com/users/EderSantana/orgs","repos_url":"https://api.github.com/users/EderSantana/repos","events_url":"https://api.github.com/users/EderSantana/events{/privacy}","received_events_url":"https://api.github.com/users/EderSantana/received_events","type":"User","site_admin":false},"labels":[],"state":"closed","locked":false,"assignee":null,"milestone":null,"comments":119,"created_at":"2015-07-15T14:38:31Z","updated_at":"2015-11-06T17:46:32Z","closed_at":"2015-08-13T14:33:52Z","body":"Assume we are trying to learn a sequence to sequence map. For this we can use Recurrent and TimeDistributedDense layers. Now assume that the sequences have different lengths. We should pad both input and desired sequences with zeros, right? But how will the objective function handle the  padded values? There is no choice to pass a mask to the objective function. Won't this bias the cost function?"},"comment":{"url":"https://api.github.com/repos/fchollet/keras/issues/comments/154483117","html_url":"https://github.com/fchollet/keras/issues/395#issuecomment-154483117","issue_url":"https://api.github.com/repos/fchollet/keras/issues/395","id":154483117,"user":{"login":"gautamb85","id":1865082,"avatar_url":"https://avatars.githubusercontent.com/u/1865082?v=3","gravatar_id":"","url":"https://api.github.com/users/gautamb85","html_url":"https://github.com/gautamb85","followers_url":"https://api.github.com/users/gautamb85/followers","following_url":"https://api.github.com/users/gautamb85/following{/other_user}","gists_url":"https://api.github.com/users/gautamb85/gists{/gist_id}","starred_url":"https://api.github.com/users/gautamb85/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/gautamb85/subscriptions","organizations_url":"https://api.github.com/users/gautamb85/orgs","repos_url":"https://api.github.com/users/gautamb85/repos","events_url":"https://api.github.com/users/gautamb85/events{/privacy}","received_events_url":"https://api.github.com/users/gautamb85/received_events","type":"User","site_admin":false},"created_at":"2015-11-06T17:46:31Z","updated_at":"2015-11-06T17:46:31Z","body":"@wxs It would really be good to compare notes! I know that another keras contributor lives in Montreal, I will try to get in touch with him. Maybe lets do a post on the google-group for a meetup?\r\nPs. Get ready for some serious cold :)"}}