Hello, Yes the extensions may be a bit out of date, sorry about that. Could you make a git diff against the latest master branch of the git repository, and then email me the diff? Then I can take a look and/or help make an extension out of it.
Patrick On 9/9/19 5:44 PM, Bob Smith wrote: > I have written a function for GSL to perform Numerical Differentiation > which I would like to offer to this project. > > I saw on https://www.gnu.org/software/gsl/ that I should first propose > it as an extension, however the "How to help" link under > Extensions/Applications goes nowhere, so I wondered if there was > somewhere else to look for guidelines on setting up an extension. > > I looked over most of the links to the listed extensions (many of > which are broken) and didn't see any commonality which may be the > answer to my question. In any case, to whom do I write to get added > to the list of extensions? > > Thanks for your help. > > FWIW, the new function is more accurate (up to 13 or 14 significant > digits vs. 9 or 10 for <gsl_deriv_central>) and can compute Nth > derivatives by passing N (1 through 9) to the function at zero > additional cost in performance. The algorithm is based upon the papers > > “New Finite Difference Formulas for Numerical Differentiation”, I.R. > Khan, R. Ohba / Journal of Computational and Applied Mathematics 126 > (2000) pp. 269-276 > > “Taylor Series Based Finite Difference Approximations of Higher-Degree > Derivatives”, I.R. Khan, R. Ohba / Journal of Computational and > Applied Mathematics 154 (2003) pp. 115-124 >
