This is interesting. We have a raft of mathematically qualified committers on Mahout, and this message asking for help on commons-math, and a raft of code marooned at mahout that wants to be in commons math. If I were one of those mathematically competant individuals, I'd be off attaching a patch or three to a JIRA or two ...
On Wed, Dec 9, 2009 at 1:48 PM, Luc Maisonobe <luc.maison...@free.fr> wrote: > Ted Dunning a écrit : >> Actually, the reason that we have Colt in Mahout is it has proven impossible >> to get changes into commons math. We really, really wanted to use commons >> math rather than have our own linear algebra package, but it just proved >> impossible and we didn't want to wait forever. > > If you really, really wants to use commons math and want changes to be > included, contribute them. > > I think the only change that was proposed and not done because of lack > of consensus was the inclusion of MTJ (and I don't consider the > discussion closed on that topic either, so it may still happen some > day). All the other changes that are desired are simply lacking someone > to do the work. There were proposals to extend the linear algebra API, > proposals to add more support for sparse matrices, proposals to get > partial decomposition ... But sparse contributions (pun intended). > > I try to do what I can, but as you have probably seen have been rather > silent since 2.0 release. For my part, I really, really need help. I > would like to fix the problems in the eigen decomposition and SVD but > need a good kick to get on it, and having only requests and no help is > not really motivating. > > Luc > >> >> If that problem were solved, then it would be great to depend on commons >> math. If that problem isn't solved, then there is no way to depend on >> commons math. >> >> On Tue, Dec 8, 2009 at 6:19 AM, Benson Margulies >> <bimargul...@gmail.com>wrote: >> >>> We can't possibly have a dependency on Mahout in the long term. Either >>> we all go shares on code in some other piece of commons, or we end up >>> with two forks, which would be sad. >>> >>> On Tue, Dec 8, 2009 at 8:33 AM, James Carman <ja...@carmanconsulting.com> >>> wrote: >>>> I wouldn't like to see a dependency on mahout code in a "commons" >>>> library. That seems kind of backwards. If Mahout wants to offload >>>> this stuff, we can move it into a library in commons (which is >>>> typically how stuff used to happen in Jakarta). >>>> >>>> On Tue, Dec 8, 2009 at 8:18 AM, Benson Margulies <bimargul...@gmail.com> >>> wrote: >>>>> Mahout now has a fork of a portion of the 'category A' portion of the >>>>> CERN colt library forked. The Mahout fork is, of course, in the Mahout >>>>> tree under a Mahout Java package and Maven triple. >>>>> >>>>> I want to use the collections classes from Mahout as the core to a new >>>>> set of commons-primitives classes that do the useful things that GNU >>>>> Trove does. >>>>> >>>>> The classes I want to start from depend on the classes that are in the >>>>> Mahout fork. >>>>> >>>>> As a temporary expedient, I can depend on their there. However, I >>>>> submit that it would be more better if the mathematical code were in >>>>> commons-math. Was this option explored? >>>>> >>>>> --------------------------------------------------------------------- >>>>> To unsubscribe, e-mail: dev-unsubscr...@commons.apache.org >>>>> For additional commands, e-mail: dev-h...@commons.apache.org >>>>> >>>>> >>>> --------------------------------------------------------------------- >>>> To unsubscribe, e-mail: dev-unsubscr...@commons.apache.org >>>> For additional commands, e-mail: dev-h...@commons.apache.org >>>> >>>> >>> --------------------------------------------------------------------- >>> To unsubscribe, e-mail: dev-unsubscr...@commons.apache.org >>> For additional commands, e-mail: dev-h...@commons.apache.org >>> >>> >> >> > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: dev-unsubscr...@commons.apache.org > For additional commands, e-mail: dev-h...@commons.apache.org > > --------------------------------------------------------------------- To unsubscribe, e-mail: dev-unsubscr...@commons.apache.org For additional commands, e-mail: dev-h...@commons.apache.org
