thanks, ideally I would need both symmetric and diagonal. On Sat, Jan 14, 2012 at 8:26 AM, Sebastian Schelter <[email protected]> wrote:
> I think Tamas referred to matrices that are symmetric (only the upper > triangular half would need to be stored) not diagonal matrices. > > > On 14.01.2012 05:25, Lance Norskog wrote: > > org.apache.mahout.math.DiagonalMatrix > > > > It even supports sparse values in the diagonal! > > > > On Fri, Jan 13, 2012 at 9:00 AM, Tamas Jambor (Commented) (JIRA) > > <[email protected]> wrote: > >> > >> [ > https://issues.apache.org/jira/browse/MAHOUT-737?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13185670#comment-13185670] > >> > >> Tamas Jambor commented on MAHOUT-737: > >> ------------------------------------- > >> > >> I think so. When will you be releasing 0.6? I am planning to do a bit > more extensive testing in the next 2-3 weeks. > >> > >>> Implicit Alternating Least Squares SVD > >>> -------------------------------------- > >>> > >>> Key: MAHOUT-737 > >>> URL: https://issues.apache.org/jira/browse/MAHOUT-737 > >>> Project: Mahout > >>> Issue Type: New Feature > >>> Components: Collaborative Filtering > >>> Affects Versions: 0.6 > >>> Reporter: Tamas Jambor > >>> Assignee: Sebastian Schelter > >>> Attachments: MAHOUT-737-2.patch, MAHOUT-737.patch, > MAHOUT-737.patch, MAHOUT-737.patch, MAHOUT-737.patch > >>> > >>> > >>> I am sharing this Java implementation of mine that is based on the > paper - Collaborative Filtering with Implicit Datasets. The implementation > is multi-treading and can be easily extended to use it on Hadoop. In fact > this approach would possibly work with non-implicit datasets, but further > testing is needed. The algorithm is tried and tested on an implicit > TV-viewing dataset, and the performance was pretty good (details to follow). > >> > >> -- > >> This message is automatically generated by JIRA. > >> If you think it was sent incorrectly, please contact your JIRA > administrators: > https://issues.apache.org/jira/secure/ContactAdministrators!default.jspa > >> For more information on JIRA, see: > http://www.atlassian.com/software/jira > >> > >> > > > > > > > >
