{"action":"created","issue":{"url":"https://api.github.com/repos/apache/spark/issues/8611","labels_url":"https://api.github.com/repos/apache/spark/issues/8611/labels{/name}","comments_url":"https://api.github.com/repos/apache/spark/issues/8611/comments","events_url":"https://api.github.com/repos/apache/spark/issues/8611/events","html_url":"https://github.com/apache/spark/pull/8611","id":105011774,"number":8611,"title":"[WIP] [SPARK-8518] [ML] Log-linear models for survival analysis ","user":{"login":"yanboliang","id":1962026,"avatar_url":"https://avatars.githubusercontent.com/u/1962026?v=3","gravatar_id":"","url":"https://api.github.com/users/yanboliang","html_url":"https://github.com/yanboliang","followers_url":"https://api.github.com/users/yanboliang/followers","following_url":"https://api.github.com/users/yanboliang/following{/other_user}","gists_url":"https://api.github.com/users/yanboliang/gists{/gist_id}","starred_url":"https://api.github.com/users/yanboliang/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/yanboliang/subscriptions","organizations_url":"https://api.github.com/users/yanboliang/orgs","repos_url":"https://api.github.com/users/yanboliang/repos","events_url":"https://api.github.com/users/yanboliang/events{/privacy}","received_events_url":"https://api.github.com/users/yanboliang/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"milestone":null,"comments":3,"created_at":"2015-09-05T07:47:03Z","updated_at":"2015-09-07T11:02:16Z","closed_at":null,"pull_request":{"url":"https://api.github.com/repos/apache/spark/pulls/8611","html_url":"https://github.com/apache/spark/pull/8611","diff_url":"https://github.com/apache/spark/pull/8611.diff","patch_url":"https://github.com/apache/spark/pull/8611.patch"},"body":"[Accelerated Failure Time (AFT) model](https://en.wikipedia.org/wiki/Accelerated_failure_time_model) is the most commonly used and easy to parallel method of survival analysis for censored survival data. It is the log-linear model based on the Weibull distribution of the survival time.\r\nUsers can refer to the R function [```survreg```](https://stat.ethz.ch/R-manual/R-devel/library/survival/html/survreg.html) to compare the model and [```predict```](https://stat.ethz.ch/R-manual/R-devel/library/survival/html/predict.survreg.html) to compare the prediction. There are different kinds of model prediction, I have just select the most common used type ```quantile```.\r\nThis is the initial implementation, please overlook the tiny issues and focus on the main ones.\r\nSome important features are under working and should be discussed include: \r\n> Standardization\r\n> Regularization\r\n> More robust test cases\r\n> The model prediction type\r\n> Should we support other kind of distribution?"},"comment":{"url":"https://api.github.com/repos/apache/spark/issues/comments/138270187","html_url":"https://github.com/apache/spark/pull/8611#issuecomment-138270187","issue_url":"https://api.github.com/repos/apache/spark/issues/8611","id":138270187,"user":{"login":"AmplabJenkins","id":4031291,"avatar_url":"https://avatars.githubusercontent.com/u/4031291?v=3","gravatar_id":"","url":"https://api.github.com/users/AmplabJenkins","html_url":"https://github.com/AmplabJenkins","followers_url":"https://api.github.com/users/AmplabJenkins/followers","following_url":"https://api.github.com/users/AmplabJenkins/following{/other_user}","gists_url":"https://api.github.com/users/AmplabJenkins/gists{/gist_id}","starred_url":"https://api.github.com/users/AmplabJenkins/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/AmplabJenkins/subscriptions","organizations_url":"https://api.github.com/users/AmplabJenkins/orgs","repos_url":"https://api.github.com/users/AmplabJenkins/repos","events_url":"https://api.github.com/users/AmplabJenkins/events{/privacy}","received_events_url":"https://api.github.com/users/AmplabJenkins/received_events","type":"User","site_admin":false},"created_at":"2015-09-07T11:02:16Z","updated_at":"2015-09-07T11:02:16Z","body":" Merged build triggered."}}