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Re: [Help-gsl] monotone interpolation
From: |
Andrew W. Steiner |
Subject: |
Re: [Help-gsl] monotone interpolation |
Date: |
Fri, 2 Mar 2012 14:06:21 +0900 |
Hello all,
Just in case it hasn't been said explicitly, a GSL interpolation type which
preserves monotonicity and keeps the same interface as the other GSL
interpolation types would certainly be welcome!
Take care,
Andrew
http://o2scl.sourceforge.net
On Fri, Mar 2, 2012 at 10:57 AM, Feng Chen <address@hidden> wrote:
> How about this one? (The green curve does not look like monotonic to me
> though ... The blue curve is the reference you cited)
>
> MESA/INTERP_1D
> monotonicity preserving cubic interpolation
> piecewise monotonic cubic interpolation
>
> http://mesa.sourceforge.net/interp_1D.html
>
>
> On Thu, Mar 1, 2012 at 1:30 PM, Christian Krueger <address@hidden>
> wrote:
>>
>> Hi... is there any possibility to get a strictly monotone interpolation
> function?
>>
>> I have data which for sure have to be monotone, but the provided
> interpolation methods (cspline, akima) do not preserve this condition
> (linear interpolation is not smooth and polynomial of course useless with
> 200+ datapoints).
>>
>> I wonder whether the method of Steffen (1990) is implemented somewhere
> which seem to have some nice features (monotonicity, almost no spurious
> oscillations)? Or might it be a useful extension for GSL?
>> Found in this paper: A simple method for monotonic interpolation in one
> dimension, Astron. Astrophys. 239, 443 (1990)
>>
>>
>> Regards,
>> Christian
>>
- [Help-gsl] monotone interpolation, Christian Krueger, 2012/03/01
- Re: [Help-gsl] monotone interpolation, Feng Chen, 2012/03/01
- Re: [Help-gsl] monotone interpolation,
Andrew W. Steiner <=
- Re: [Help-gsl] monotone interpolation, Christian Krueger, 2012/03/02
- Re: [Help-gsl] monotone interpolation, Rhys Ulerich, 2012/03/02
- Re: [Help-gsl] monotone interpolation, Christian Krueger, 2012/03/02
- Re: [Help-gsl] monotone interpolation, Christian Krueger, 2012/03/02
- Re: [Help-gsl] monotone interpolation, Rhys Ulerich, 2012/03/08
- Re: [Help-gsl] monotone interpolation, Christian Krueger, 2012/03/08