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Re: getting derivatives from spline [message #66063 is a reply to message #66043]

Sat, 11 April 2009 09:11

lbusett@yahoo.it
Messages: 30
Registered: February 2006

Member

On 11 Apr, 08:56, Jeremy Bailin <astroco...@gmail.com> wrote:
> Does anyone know a way of getting SPLINE or any of its friends to
> return the derivatives of the interpolating function at the desired
> abscissae in addition to the interpolated values?
>
> Or, another way of getting at this question: what is everyone's
> favourite algorithm for numerically calculating the derivatives of
> (slightly) noisy data?
>
> -Jeremy.

Hi Jeremy,

I would consider Savitzky and Golay smoothing. The IDL "SAVGOL"
routine allows to compute the derivatives of the de-noised data.

Hope this helps,

Lorenso

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[Message index]

		Re: getting derivatives from spline By: Jeremy Bailin on Tue, 14 April 2009 05:50
		Re: getting derivatives from spline By: jameskuyper on Mon, 13 April 2009 09:54
		Re: getting derivatives from spline By: lbusett@yahoo.it on Sat, 11 April 2009 09:11

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