Return-Path: X-Original-To: apmail-spark-issues-archive@minotaur.apache.org Delivered-To: apmail-spark-issues-archive@minotaur.apache.org Received: from mail.apache.org (hermes.apache.org [140.211.11.3]) by minotaur.apache.org (Postfix) with SMTP id D4EE11859A for ; Tue, 7 Jul 2015 23:10:04 +0000 (UTC) Received: (qmail 30807 invoked by uid 500); 7 Jul 2015 23:10:04 -0000 Delivered-To: apmail-spark-issues-archive@spark.apache.org Received: (qmail 30771 invoked by uid 500); 7 Jul 2015 23:10:04 -0000 Mailing-List: contact issues-help@spark.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Delivered-To: mailing list issues@spark.apache.org Received: (qmail 30761 invoked by uid 99); 7 Jul 2015 23:10:04 -0000 Received: from arcas.apache.org (HELO arcas.apache.org) (140.211.11.28) by apache.org (qpsmtpd/0.29) with ESMTP; Tue, 07 Jul 2015 23:10:04 +0000 Date: Tue, 7 Jul 2015 23:10:04 +0000 (UTC) From: "Feynman Liang (JIRA)" To: issues@spark.apache.org Message-ID: In-Reply-To: References: Subject: [jira] [Commented] (SPARK-8536) Generalize LDA to asymmetric priors MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit X-JIRA-FingerPrint: 30527f35849b9dde25b450d4833f0394 [ https://issues.apache.org/jira/browse/SPARK-8536?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14617616#comment-14617616 ] Feynman Liang commented on SPARK-8536: -------------------------------------- (Rethinking LDA: Why Priors Matter, Wallach 09, http://dirichlet.net/pdf/wallach09rethinking.pdf) suggests that asymmetric priors is only useful for the document-topic distribution. > Generalize LDA to asymmetric priors > ----------------------------------- > > Key: SPARK-8536 > URL: https://issues.apache.org/jira/browse/SPARK-8536 > Project: Spark > Issue Type: Improvement > Components: MLlib > Reporter: Joseph K. Bradley > Original Estimate: 216h > Remaining Estimate: 216h > > Several users have requested LDA using asymmetric priors, including learning those hyperparameters. We should add this functionality. > Note that it could be added to EM, online LDA, or both. I suggest adding it to online LDA initially, followed by EM in a separate PR. -- This message was sent by Atlassian JIRA (v6.3.4#6332) --------------------------------------------------------------------- To unsubscribe, e-mail: issues-unsubscribe@spark.apache.org For additional commands, e-mail: issues-help@spark.apache.org