on it! i am running my own test right now on the mnist testset, and i think in the next few days, i could upload the patch. but i still got a little testing going on. I ll let you know when it is ready!
2012/2/5 Viktor Gal (Commented) (JIRA) <[email protected]> > > [ > https://issues.apache.org/jira/browse/MAHOUT-968?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13200920#comment-13200920] > > Viktor Gal commented on MAHOUT-968: > ----------------------------------- > > any patch available for test? as i'd gladly give it a go for testing...thnx > > > Classifier based on restricted boltzmann machines > > ------------------------------------------------- > > > > Key: MAHOUT-968 > > URL: https://issues.apache.org/jira/browse/MAHOUT-968 > > Project: Mahout > > Issue Type: New Feature > > Components: Classification > > Reporter: Dirk Weißenborn > > Labels: classification, mnist > > Original Estimate: 336h > > Remaining Estimate: 336h > > > > This is a proposal for a new classifier based on restricted boltzmann > machines. The development of this feature follows the paper on "Deep > Boltzmann Machines" (DBM) [1] from 2009. The proposed model (DBM) got an > error rate of 0.95% on the mnist dataset [2], which is really good. Main > parts of the implementation should also be applicable to other scenarios > than classification where restricted boltzmann machines are used (ref. > MAHOUT-375). > > I am working on this feature right now, and the results are promising. > The only problem with the training algorithm is, that it is still mostly > sequential (if training batches are small, what they should be), which > makes Map/Reduce until now, not really beneficial. However, since the > algorithm itself is fast (for a training algorithm), training can be done > on a single machine in managable time. > > Testing of the algorithm is currently done on the mnist dataset itself > to reproduce results of [1]. As soon as results indicate, that everything > is working fine, I will upload the patch. > > [1] http://www.cs.toronto.edu/~hinton/absps/dbm.pdf > > [2] http://yann.lecun.com/exdb/mnist/ > > -- > 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 > > >
