Addons and labs need to change to use cover adverb and I think it will work even better than before because D. can be enhanced much easier if it is implemented in J scripts.
On Tue, Aug 27, 2019, 9:08 AM Ben Gorte <[email protected]> wrote: > Good morning, > > I was in a Geodesy department for many years and am still doing those kind > of things. Geodesists are the well-known masters of least-squares > adjustment, but not being a geodesist myself, most of my career is based on > the Best Fit lab, notably on the (in)famous adverb: > > Nwtn =: adverb def 'y - (u y)%.(u D.1 y)' > > > I guess it's getting time for retirement :-) > > > Greetings from Sydney, > > Ben > > > > On Tue, 27 Aug 2019 at 09:05, Henry Rich <[email protected]> wrote: > > > J has supported symbolic differentiation and integration for some time. > > Starting with Release 9.01, primitive support for calculus is withdrawn. > > > > The calculus primitives were a proof-of-concept that was an incomplete > > success. They worked, but they were not complete, and the nature of > > mathematics is such that they will never be complete. It has long been > > clear that they should have been implemented in a J script, which would > > be much easier to expand & maintain. > > > > The primitives for Taylor series - t. t: T. - are terminated with > > extreme prejudice. > > > > The primitives for differentiation and integration - d. D. D: - are also > > removed, but they are going to a Better Place. A new addon, > > math/calculus, is now available. It provides most of the features of > > the calculus primitives. Interested users are encouraged to fix & > > expand this addon to give support for more methods of integration and > > differentiation. > > > > Henry Rich > > > > --- > > This email has been checked for viruses by AVG. > > https://www.avg.com > > > > ---------------------------------------------------------------------- > > For information about J forums see http://www.jsoftware.com/forums.htm > > > ---------------------------------------------------------------------- > For information about J forums see http://www.jsoftware.com/forums.htm > ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
