On Thu, 21 Jul 2022 17:56:45 -0400 John Kitzmiller <jki...@gmail.com> wrote:
> (Apologies for double-dipping, but usage direction for the > least-squares fit extension in m-graph would be a gift.) The least-squares fit (to a polynomial) is a deterministic calculation, not an arbitrary non-linear search. As such, it is very robust. Certain (useful) functions, a Gaussian peak for example, can be suitably transformed to a polynomial function, so these are handled as well, robustly. Examples are given as comments in mp-grap.mpiv that you can follow. I can send you off-list an adapted version of the original John Hobby documentation, with extensions described. Note that the m-graph module is simply a re-write of the John Hobby graph macros, taking advantage of floating-point MetaPost (thus simplified). %%%%%%%%%%%%%%%%%%%%%%%% I have been working on a completely new luagraph module that does much in lua. It has, notably, arbitrary coordinate systems. This has been a moving target as I put more and more into lua and less and less in Metapost. I have also been playing chase with the development of luametatex (and have fallen behind). Alan ___________________________________________________________________________________ If your question is of interest to others as well, please add an entry to the Wiki! maillist : ntg-context@ntg.nl / https://www.ntg.nl/mailman/listinfo/ntg-context webpage : https://www.pragma-ade.nl / http://context.aanhet.net archive : https://bitbucket.org/phg/context-mirror/commits/ wiki : https://contextgarden.net ___________________________________________________________________________________
