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Spline Fitting and FWHM
- Subject: Spline Fitting and FWHM
- From: Peter den Hartog <hartog(at)astro.uu.nl>
- Date: Tue, 21 Nov 2000 10:53:52 +0100
- Newsgroups: comp.lang.idl-pvwave
- Organization: Utrecht University, Dept. of Physics and Astronomy
- Reply-To: hartog(at)nospam.astro.uu.nl
- Xref: news.doit.wisc.edu comp.lang.idl-pvwave:22278
Hi,
I have some data tabulated in two arrays (pixels versus intensities) .
The idea is to fit a cubic spline to the data with the function SPLINE
but I am struggling with the following problem: I would like to be able
to extract a full width at half maximum and at quarter maximum out of
the fit. How can I accomplish this, as the function SPLINE only reads
x-values and returns corresponding, fitted y-values as result, while I
am interested in the reverse.
Thanks!
Omar Noor
student astronomy
Utrecht University Netherlands
o.f.d.noor@phys.uu.nl