On 9/10/2019 9:05 PM, Patrick Alken wrote:
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Yes the extensions may be a bit out of date, sorry about that.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.
Thanks for you kind offer. I'll get back to you when I get git sorted.
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
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_______________________________________________________________
Bob Smith - [email protected]
http://www.sudleyplace.com - http://www.nars2000.org
