If by ridge estimator you imply l1 regularization, afaik you can choose from l1 and l2 gularization.
Also I guess ridge implies identity link function, but I don't think mahout is limited just to ridge and lasso. Ted knows for sure. On Sep 28, 2011 7:27 PM, "Keith Thompson" <[email protected]> wrote: > Thanks Dmitriy. I also found the Mahout in Action book and checked there. > In one of the examples it seems there is a --categories option which allows > the user to specify the number of categories for classification purposes > (although all of the examples in the text are binary classifications). I am > curious though as to whether the algorithm employed in Mahout uses ridge > estimators or not. > > Keith > > On Wed, Sep 28, 2011 at 10:18 PM, Dmitriy Lyubimov <[email protected] >wrote: > >> As far as I know, Mahout implementation does multinomial classification. >> On Sep 28, 2011 8:47 AM, "Keith Thompson" <[email protected]> wrote: >> > Is the version of the logistic regression classifier in Mahout for >> binomial >> > classification only or can it be used for multinomial as well? >> > >> > Regards, >> > Keith >> > > > > -- > *Keith Thompson* > Graduate Research Associate, Xerox Corporation > SUNY Research Foundation > Dept. of Systems Science and Industrial Engineering > Binghamton University > work: 585-422-6587 > cell: 607-793-6203
