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 ______________________________________________ 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.
