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Re: gaussian convolution [message #53174 is a reply to message #3199]

Fri, 23 March 2007 10:03

helaha
Messages: 26
Registered: March 2004

Junior Member

Hello Tim,
If lower resolution means, that you want to reduce the number of
wavelength bins, then I think interpolation (INTERPOLATE, REBIN, or
CONGRID) is the way.
e.g.:
Spec = FLOATARR(100) ;100 initial intensity values
Spec =............. ; Set Spec with your values
Spec = CONGRID(Spec, 50, /INTERP);now the spectrum has only 50
wavelength bins

hope this helps,
helaha

On Mar 23, 4:00 pm, mikeinthe...@yahoo.com wrote:
> Hi there,
>
> I have a (theoretically computed) spectrum and I would like to degrade
> it to a lower resolution.
>
> I was wondering if there is any standard procedure to do it and/or
> some "pre-cooked" routine in IDL. Is there any gaussian filter
> routine?
>
> My first guess would be to use a gaussian filter in order to reduce
> the resolution. The spectrum is (intensity vs. wavelength),so I
> think 1D gaussian filter would be OK. Is there anyone with experience
> on it ?
>
> Suggestions are welcome, thanks! Cheers,
> Tim

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[Message index]

		Gaussian Convolution By: Thomas Edgar Nichols on Sun, 13 November 1994 21:24
		Re: gaussian convolution By: news.verizon.net on Sat, 24 March 2007 09:20
		Re: gaussian convolution By: Kaushal Sharma on Wed, 27 September 2017 03:37
		Re: gaussian convolution By: wlandsman on Wed, 27 September 2017 10:15
		Re: gaussian convolution By: helaha on Fri, 23 March 2007 10:03

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