Hi Ivan! Thank you for your valuable insights! I look forward to learning more about numerical differentiation and about this subject.
The pracma package and the fornberg() function is impressive. I got some really good approximations on my derivatives. Thank you! Kostas On Tue, Jan 31, 2023 at 12:18 PM Ivan Krylov <krylov.r...@gmail.com> wrote: > В Tue, 31 Jan 2023 11:16:21 +0200 > konstantinos christodoulou <konstantinos.christodoul...@gmail.com> > пишет: > > > How can I find the derivatives of the atmospheric measurements at each > > altitude? > > Welcome to the world of finite difference methods! If you can find a > good textbook on them, it may be a good idea to skim it. > > pracma::fornberg() will give you a numerically stable approximation > (otherwise the Vandermonde matrix required to obtain the Taylor series > coefficients may get hard to solve) to the derivative values you're > interested in, but do note that they are only approximations. In > particular, there's less information for the values at the ends of > the altitude range than for the points in the middle. > > > [[alternative HTML version deleted]] > > P.S. Please compose your messages to R-help in plain text: > https://www.r-project.org/posting-guide.html > https://stat.ethz.ch/pipermail/r-help/2023-January/476845.html > > -- > Best regards, > Ivan > [[alternative HTML version deleted]] ______________________________________________ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
