{"action":"opened","number":955,"pull_request":{"url":"https://api.github.com/repos/deeplearning4j/deeplearning4j/pulls/955","id":53563378,"html_url":"https://github.com/deeplearning4j/deeplearning4j/pull/955","diff_url":"https://github.com/deeplearning4j/deeplearning4j/pull/955.diff","patch_url":"https://github.com/deeplearning4j/deeplearning4j/pull/955.patch","issue_url":"https://api.github.com/repos/deeplearning4j/deeplearning4j/issues/955","number":955,"state":"open","locked":false,"title":"Add early stopping functionality","user":{"login":"AlexDBlack","id":2360237,"avatar_url":"https://avatars.githubusercontent.com/u/2360237?v=3","gravatar_id":"","url":"https://api.github.com/users/AlexDBlack","html_url":"https://github.com/AlexDBlack","followers_url":"https://api.github.com/users/AlexDBlack/followers","following_url":"https://api.github.com/users/AlexDBlack/following{/other_user}","gists_url":"https://api.github.com/users/AlexDBlack/gists{/gist_id}","starred_url":"https://api.github.com/users/AlexDBlack/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/AlexDBlack/subscriptions","organizations_url":"https://api.github.com/users/AlexDBlack/orgs","repos_url":"https://api.github.com/users/AlexDBlack/repos","events_url":"https://api.github.com/users/AlexDBlack/events{/privacy}","received_events_url":"https://api.github.com/users/AlexDBlack/received_events","type":"User","site_admin":false},"body":"***WIP DO NOT MERGE***\r\n\r\nBasic idea with early stopping:\r\n- Keep training until a termination condition is hit\r\n- Keep track of best score for each epoch\r\n  - Score: loss function on test set, accuracy on test set, etc (i.e., user specifies what they want to optimize)\r\n  - Or calculate score every N epochs\r\n  - Can (optionally) save latest model, in addition to best model\r\n- Save best model (usually to disk, but also to memory or some other place via EarlyStoppingModelSaver)\r\n- Two types of termination conditions:\r\n  - Per iteration conditions, based on minibatch score only (i.e., check for NaN score, exploding score, or max training time)\r\n  - Per epoch conditions, based on loss function, accuracy etc on test set. For things like no improvement in N epochs, or max training epochs, etc.\r\n\r\nTODO:\r\n- Early stopping for Spark\r\n  - + HDFS model saving for early stopping\r\n- Add \"no improvement for N epochs\" termination condition\"\r\n- Proper javadoc","created_at":"2015-12-14T13:19:56Z","updated_at":"2015-12-14T13:19:56Z","closed_at":null,"merged_at":null,"merge_commit_sha":"a06bccc997b7b57128f400d2fe1ac1bbf941bef4","assignee":null,"milestone":null,"commits_url":"https://api.github.com/repos/deeplearning4j/deeplearning4j/pulls/955/commits","review_comments_url":"https://api.github.com/repos/deeplearning4j/deeplearning4j/pulls/955/comments","review_comment_url":"https://api.github.com/repos/deeplearning4j/deeplearning4j/pulls/comments{/number}","comments_url":"https://api.github.com/repos/deeplearning4j/deeplearning4j/issues/955/comments","statuses_url":"https://api.github.com/repos/deeplearning4j/deeplearning4j/statuses/51b4b2f4f86eb960687594d281d2fadf0ebd7a0d","head":{"label":"deeplearning4j:earlystopping","ref":"earlystopping","sha":"51b4b2f4f86eb960687594d281d2fadf0ebd7a0d","user":{"login":"deeplearning4j","id":10988606,"avatar_url":"https://avatars.githubusercontent.com/u/10988606?v=3","gravatar_id":"","url":"https://api.github.com/users/deeplearning4j","html_url":"https://github.com/deeplearning4j","followers_url":"https://api.github.com/users/deeplearning4j/followers","following_url":"https://api.github.com/users/deeplearning4j/following{/other_user}","gists_url":"https://api.github.com/users/deeplearning4j/gists{/gist_id}","starred_url":"https://api.github.com/users/deeplearning4j/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/deeplearning4j/subscriptions","organizations_url":"https://api.github.com/users/deeplearning4j/orgs","repos_url":"https://api.github.com/users/deeplearning4j/repos","events_url":"https://api.github.com/users/deeplearning4j/events{/privacy}","received_events_url":"https://api.github.com/users/deeplearning4j/received_events","type":"Organization","site_admin":false},"repo":{"id":14734876,"name":"deeplearning4j","full_name":"deeplearning4j/deeplearning4j","owner":{"login":"deeplearning4j","id":10988606,"avatar_url":"https://avatars.githubusercontent.com/u/10988606?v=3","gravatar_id":"","url":"https://api.github.com/users/deeplearning4j","html_url":"https://github.com/deeplearning4j","followers_url":"https://api.github.com/users/deeplearning4j/followers","following_url":"https://api.github.com/users/deeplearning4j/following{/other_user}","gists_url":"https://api.github.com/users/deeplearning4j/gists{/gist_id}","starred_url":"https://api.github.com/users/deeplearning4j/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/deeplearning4j/subscriptions","organizations_url":"https://api.github.com/users/deeplearning4j/orgs","repos_url":"https://api.github.com/users/deeplearning4j/repos","events_url":"https://api.github.com/users/deeplearning4j/events{/privacy}","received_events_url":"https://api.github.com/users/deeplearning4j/received_events","type":"Organization","site_admin":false},"private":false,"html_url":"https://github.com/deeplearning4j/deeplearning4j","description":"Deep Learning for Java, Scala & Clojure on Hadoop, Spark & GPUs","fork":false,"url":"https://api.github.com/repos/deeplearning4j/deeplearning4j","forks_url":"https://api.github.com/repos/deeplearning4j/deeplearning4j/forks","keys_url":"https://api.github.com/repos/deeplearning4j/deeplearning4j/keys{/key_id}","collaborators_url":"https://api.github.com/repos/deeplearning4j/deeplearning4j/collaborators{/collaborator}","teams_url":"https://api.github.com/repos/deeplearning4j/deeplearning4j/teams","hooks_url":"https://api.github.com/repos/deeplearning4j/deeplearning4j/hooks","issue_events_url":"https://api.github.com/repos/deeplearning4j/deeplearning4j/issues/events{/number}","events_url":"https://api.github.com/repos/deeplearning4j/deeplearning4j/events","assignees_url":"https://api.github.com/repos/deeplearning4j/deeplearning4j/assignees{/user}","branches_url":"https://api.github.com/repos/deeplearning4j/deeplearning4j/branches{/branch}","tags_url":"https://api.github.com/repos/deeplearning4j/deeplearning4j/tags","blobs_url":"https://api.github.com/repos/deeplearning4j/deeplearning4j/git/blobs{/sha}","git_tags_url":"https://api.github.com/repos/deeplearning4j/deeplearning4j/git/tags{/sha}","git_refs_url":"https://api.github.com/repos/deeplearning4j/deeplearning4j/git/refs{/sha}","trees_url":"https://api.github.com/repos/deeplearning4j/deeplearning4j/git/trees{/sha}","statuses_url":"https://api.github.com/repos/deeplearning4j/deeplearning4j/statuses/{sha}","languages_url":"https://api.github.com/repos/deeplearning4j/deeplearning4j/languages","stargazers_url":"https://api.github.com/repos/deeplearning4j/deeplearning4j/stargazers","contributors_url":"https://api.github.com/repos/deeplearning4j/deeplearning4j/contributors","subscribers_url":"https://api.github.com/repos/deeplearning4j/deeplearning4j/subscribers","subscription_url":"https://api.github.com/repos/deeplearning4j/deeplearning4j/subscription","commits_url":"https://api.github.com/repos/deeplearning4j/deeplearning4j/commits{/sha}","git_commits_url":"https://api.github.com/repos/deeplearning4j/deeplearning4j/git/commits{/sha}","comments_url":"https://api.github.com/repos/deeplearning4j/deeplearning4j/comments{/number}","issue_comment_url":"https://api.github.com/repos/deeplearning4j/deeplearning4j/issues/comments{/number}","contents_url":"https://api.github.com/repos/deeplearning4j/deeplearning4j/contents/{+path}","compare_url":"https://api.github.com/repos/deeplearning4j/deeplearning4j/compare/{base}...{head}","merges_url":"https://api.github.com/repos/deeplearning4j/deeplearning4j/merges","archive_url":"https://api.github.com/repos/deeplearning4j/deeplearning4j/{archive_format}{/ref}","downloads_url":"https://api.github.com/repos/deeplearning4j/deeplearning4j/downloads","issues_url":"https://api.github.com/repos/deeplearning4j/deeplearning4j/issues{/number}","pulls_url":"https://api.github.com/repos/deeplearning4j/deeplearning4j/pulls{/number}","milestones_url":"https://api.github.com/repos/deeplearning4j/deeplearning4j/milestones{/number}","notifications_url":"https://api.github.com/repos/deeplearning4j/deeplearning4j/notifications{?since,all,participating}","labels_url":"https://api.github.com/repos/deeplearning4j/deeplearning4j/labels{/name}","releases_url":"https://api.github.com/repos/deeplearning4j/deeplearning4j/releases{/id}","created_at":"2013-11-27T02:03:28Z","updated_at":"2015-12-14T07:17:27Z","pushed_at":"2015-12-14T13:19:56Z","git_url":"git://github.com/deeplearning4j/deeplearning4j.git","ssh_url":"git@github.com:deeplearning4j/deeplearning4j.git","clone_url":"https://github.com/deeplearning4j/deeplearning4j.git","svn_url":"https://github.com/deeplearning4j/deeplearning4j","homepage":"http://deeplearning4j.org","size":1324174,"stargazers_count":1710,"watchers_count":1710,"language":"Java","has_issues":true,"has_downloads":true,"has_wiki":true,"has_pages":true,"forks_count":571,"mirror_url":null,"open_issues_count":90,"forks":571,"open_issues":90,"watchers":1710,"default_branch":"master"}},"base":{"label":"deeplearning4j:master","ref":"master","sha":"0f47cfd95625e142300f52ece4f0d7b0d46b4ffe","user":{"login":"deeplearning4j","id":10988606,"avatar_url":"https://avatars.githubusercontent.com/u/10988606?v=3","gravatar_id":"","url":"https://api.github.com/users/deeplearning4j","html_url":"https://github.com/deeplearning4j","followers_url":"https://api.github.com/users/deeplearning4j/followers","following_url":"https://api.github.com/users/deeplearning4j/following{/other_user}","gists_url":"https://api.github.com/users/deeplearning4j/gists{/gist_id}","starred_url":"https://api.github.com/users/deeplearning4j/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/deeplearning4j/subscriptions","organizations_url":"https://api.github.com/users/deeplearning4j/orgs","repos_url":"https://api.github.com/users/deeplearning4j/repos","events_url":"https://api.github.com/users/deeplearning4j/events{/privacy}","received_events_url":"https://api.github.com/users/deeplearning4j/received_events","type":"Organization","site_admin":false},"repo":{"id":14734876,"name":"deeplearning4j","full_name":"deeplearning4j/deeplearning4j","owner":{"login":"deeplearning4j","id":10988606,"avatar_url":"https://avatars.githubusercontent.com/u/10988606?v=3","gravatar_id":"","url":"https://api.github.com/users/deeplearning4j","html_url":"https://github.com/deeplearning4j","followers_url":"https://api.github.com/users/deeplearning4j/followers","following_url":"https://api.github.com/users/deeplearning4j/following{/other_user}","gists_url":"https://api.github.com/users/deeplearning4j/gists{/gist_id}","starred_url":"https://api.github.com/users/deeplearning4j/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/deeplearning4j/subscriptions","organizations_url":"https://api.github.com/users/deeplearning4j/orgs","repos_url":"https://api.github.com/users/deeplearning4j/repos","events_url":"https://api.github.com/users/deeplearning4j/events{/privacy}","received_events_url":"https://api.github.com/users/deeplearning4j/received_events","type":"Organization","site_admin":false},"private":false,"html_url":"https://github.com/deeplearning4j/deeplearning4j","description":"Deep Learning for Java, Scala & Clojure on Hadoop, Spark & GPUs","fork":false,"url":"https://api.github.com/repos/deeplearning4j/deeplearning4j","forks_url":"https://api.github.com/repos/deeplearning4j/deeplearning4j/forks","keys_url":"https://api.github.com/repos/deeplearning4j/deeplearning4j/keys{/key_id}","collaborators_url":"https://api.github.com/repos/deeplearning4j/deeplearning4j/collaborators{/collaborator}","teams_url":"https://api.github.com/repos/deeplearning4j/deeplearning4j/teams","hooks_url":"https://api.github.com/repos/deeplearning4j/deeplearning4j/hooks","issue_events_url":"https://api.github.com/repos/deeplearning4j/deeplearning4j/issues/events{/number}","events_url":"https://api.github.com/repos/deeplearning4j/deeplearning4j/events","assignees_url":"https://api.github.com/repos/deeplearning4j/deeplearning4j/assignees{/user}","branches_url":"https://api.github.com/repos/deeplearning4j/deeplearning4j/branches{/branch}","tags_url":"https://api.github.com/repos/deeplearning4j/deeplearning4j/tags","blobs_url":"https://api.github.com/repos/deeplearning4j/deeplearning4j/git/blobs{/sha}","git_tags_url":"https://api.github.com/repos/deeplearning4j/deeplearning4j/git/tags{/sha}","git_refs_url":"https://api.github.com/repos/deeplearning4j/deeplearning4j/git/refs{/sha}","trees_url":"https://api.github.com/repos/deeplearning4j/deeplearning4j/git/trees{/sha}","statuses_url":"https://api.github.com/repos/deeplearning4j/deeplearning4j/statuses/{sha}","languages_url":"https://api.github.com/repos/deeplearning4j/deeplearning4j/languages","stargazers_url":"https://api.github.com/repos/deeplearning4j/deeplearning4j/stargazers","contributors_url":"https://api.github.com/repos/deeplearning4j/deeplearning4j/contributors","subscribers_url":"https://api.github.com/repos/deeplearning4j/deeplearning4j/subscribers","subscription_url":"https://api.github.com/repos/deeplearning4j/deeplearning4j/subscription","commits_url":"https://api.github.com/repos/deeplearning4j/deeplearning4j/commits{/sha}","git_commits_url":"https://api.github.com/repos/deeplearning4j/deeplearning4j/git/commits{/sha}","comments_url":"https://api.github.com/repos/deeplearning4j/deeplearning4j/comments{/number}","issue_comment_url":"https://api.github.com/repos/deeplearning4j/deeplearning4j/issues/comments{/number}","contents_url":"https://api.github.com/repos/deeplearning4j/deeplearning4j/contents/{+path}","compare_url":"https://api.github.com/repos/deeplearning4j/deeplearning4j/compare/{base}...{head}","merges_url":"https://api.github.com/repos/deeplearning4j/deeplearning4j/merges","archive_url":"https://api.github.com/repos/deeplearning4j/deeplearning4j/{archive_format}{/ref}","downloads_url":"https://api.github.com/repos/deeplearning4j/deeplearning4j/downloads","issues_url":"https://api.github.com/repos/deeplearning4j/deeplearning4j/issues{/number}","pulls_url":"https://api.github.com/repos/deeplearning4j/deeplearning4j/pulls{/number}","milestones_url":"https://api.github.com/repos/deeplearning4j/deeplearning4j/milestones{/number}","notifications_url":"https://api.github.com/repos/deeplearning4j/deeplearning4j/notifications{?since,all,participating}","labels_url":"https://api.github.com/repos/deeplearning4j/deeplearning4j/labels{/name}","releases_url":"https://api.github.com/repos/deeplearning4j/deeplearning4j/releases{/id}","created_at":"2013-11-27T02:03:28Z","updated_at":"2015-12-14T07:17:27Z","pushed_at":"2015-12-14T13:19:56Z","git_url":"git://github.com/deeplearning4j/deeplearning4j.git","ssh_url":"git@github.com:deeplearning4j/deeplearning4j.git","clone_url":"https://github.com/deeplearning4j/deeplearning4j.git","svn_url":"https://github.com/deeplearning4j/deeplearning4j","homepage":"http://deeplearning4j.org","size":1324174,"stargazers_count":1710,"watchers_count":1710,"language":"Java","has_issues":true,"has_downloads":true,"has_wiki":true,"has_pages":true,"forks_count":571,"mirror_url":null,"open_issues_count":90,"forks":571,"open_issues":90,"watchers":1710,"default_branch":"master"}},"_links":{"self":{"href":"https://api.github.com/repos/deeplearning4j/deeplearning4j/pulls/955"},"html":{"href":"https://github.com/deeplearning4j/deeplearning4j/pull/955"},"issue":{"href":"https://api.github.com/repos/deeplearning4j/deeplearning4j/issues/955"},"comments":{"href":"https://api.github.com/repos/deeplearning4j/deeplearning4j/issues/955/comments"},"review_comments":{"href":"https://api.github.com/repos/deeplearning4j/deeplearning4j/pulls/955/comments"},"review_comment":{"href":"https://api.github.com/repos/deeplearning4j/deeplearning4j/pulls/comments{/number}"},"commits":{"href":"https://api.github.com/repos/deeplearning4j/deeplearning4j/pulls/955/commits"},"statuses":{"href":"https://api.github.com/repos/deeplearning4j/deeplearning4j/statuses/51b4b2f4f86eb960687594d281d2fadf0ebd7a0d"}},"merged":false,"mergeable":true,"mergeable_state":"unstable","merged_by":null,"comments":0,"review_comments":0,"commits":5,"additions":1010,"deletions":0,"changed_files":17}}