Hi, 2013/12/20 Luc Maisonobe <l...@spaceroots.org>
> Hi all, > > Le 19/12/2013 20:52, Ted Dunning a écrit : > > I had the same question. > > > > Presumably, it is a reasonable thing to have in the corner case of > needing > > eigenvalues for matrices with extended precision decimal numbers or some > > such, but I would be very surprised if there measurably non-zero demand > for > > such a feature. > > > > > > > > On Thu, Dec 19, 2013 at 9:55 AM, Martin Grotle Soukup < > > martin.grotle.sou...@gmail.com> wrote: > > > >> Hi, > >> > >> Apologies for being impatient, but does someone think this is a good > idea? > > I think it is a good idea. In fact, I even think most of our algorithms > would be interesting to provided both with primitive doubles and with > RealFieldElements. I dream of a way to automatically convert from one > implementation to the other (Apache Commons Nabla is a step in this > direction, for DerivativeStructure only but it would be worth > generalizing it). > > Indeed, I also think it would be nice to have the algorithms implemented with RealFieldElements. I will take a further look at nabla. > As Gilles often say, we are short of manpower, so we don't do this as a > general move. Ted's remark above is one of our decision driver: if there > is demand for it, it is worth doing it. So to sum up, the decision is a > case by case basis. > > Going back to this specific case, I guess that if you propose to help on > this, you have your own use case. Then I would suggest to go for it. You > could open a JIRA issue for it, try to do the implementation and attach > your code to the issue so we pick it up there, review it, and include it > in the library. > > OK, I will enhance my implementation, add appropriate unit tests and go forward with a JIRA issue. Best regards, Martin > best regards, > Luc > > >> In case of the contrary I will not trouble this mailing list with this > >> request any further. > >> > >> Best regards, > >> Martin Grotle Soukup > >> > >> > >> > >> 2013/12/13 Martin Grotle Soukup <martin.grotle.sou...@gmail.com> > >> > >>> Hi, > >>> > >>> The linear-package in commons-math contains a class that does an eigen > >>> value decomposition of a RealMatrix. Would there be of interest to add > a > >>> similar class doing eigen value decomposition of a matrix consisting of > >>> RealFieldElements? > >>> > >>> I am happy to help if this is the case. > >>> > >>> Best regards, > >>> Martin Grotle Soukup > >>> > >>> > >> > > > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: dev-unsubscr...@commons.apache.org > For additional commands, e-mail: dev-h...@commons.apache.org > >
