* Proposal For New Numerical Differentiation Function
@ 2019-09-09 23:44 Bob Smith
2019-09-11 1:05 ` Patrick Alken
0 siblings, 1 reply; 3+ messages in thread
From: Bob Smith @ 2019-09-09 23:44 UTC (permalink / raw)
To: GSL Discuss
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
âNew Finite Difference Formulas for Numerical Differentiationâ, I.R.
Khan, R. Ohba / Journal of Computational and Applied Mathematics 126
(2000) pp. 269-276
âTaylor Series Based Finite Difference Approximations of Higher-Degree
Derivativesâ, I.R. Khan, R. Ohba / Journal of Computational and Applied
Mathematics 154 (2003) pp. 115-124
--
_______________________________________________________________
Bob Smith - bsmith@sudleyplace.com
http://www.sudleyplace.com - http://www.nars2000.org
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: Proposal For New Numerical Differentiation Function
2019-09-09 23:44 Proposal For New Numerical Differentiation Function Bob Smith
@ 2019-09-11 1:05 ` Patrick Alken
2019-09-11 12:25 ` Bob Smith
0 siblings, 1 reply; 3+ messages in thread
From: Patrick Alken @ 2019-09-11 1:05 UTC (permalink / raw)
To: gsl-discuss
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Yes the extensions may be a bit out of date, sorry about that.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
>
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: Proposal For New Numerical Differentiation Function
2019-09-11 1:05 ` Patrick Alken
@ 2019-09-11 12:25 ` Bob Smith
0 siblings, 0 replies; 3+ messages in thread
From: Bob Smith @ 2019-09-11 12:25 UTC (permalink / raw)
To: gsl-discuss
On 9/10/2019 9:05 PM, Patrick Alken wrote:
> Hello,
>
> Â 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
>>
>> âNew Finite Difference Formulas for Numerical Differentiationâ, I.R.
>> Khan, R. Ohba / Journal of Computational and Applied Mathematics 126
>> (2000) pp. 269-276
>>
>> âTaylor Series Based Finite Difference Approximations of Higher-Degree
>> Derivativesâ, I.R. Khan, R. Ohba / Journal of Computational and
>> Applied Mathematics 154 (2003) pp. 115-124
>>
>
>
--
_______________________________________________________________
Bob Smith - bsmith@sudleyplace.com
http://www.sudleyplace.com - http://www.nars2000.org
^ permalink raw reply [flat|nested] 3+ messages in thread
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2019-09-11 1:05 ` Patrick Alken
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