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Curve Fitting Question [message #1309]

Tue, 14 September 1993 11:01

ftdwh
Messages: 1
Registered: September 1993

Junior Member

The question I have is how to properly use the curvefit routine to fit a
function that I am defining. It is as follows:

mclat = A1 + A2*cos(mlt + A3) + A4*cos(2*mlt + 2*A5) + A6*cos(3*mlt + 3*A7)

where mclat is the magnetic co-latitude, mlt is an angular representation of
the magnetic local time.(This is a Fourier fit)

I have in my data set the mclat and mlt, but I want to find the coefficients
A1-A7. Can I do this using the fitting routine in IDL? If I can, what are the
steps I need to follow? (As with most manuals they seem to be written for
somebody who already knows what they are doing. Along that train of thought
can any body recommend a book that might help those of us not fully
knowledgable in IDL)

David Hembroff
Geophysical Institute
University of Alaska Fairbanks
"I R A Grad Student"

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[Message index]

		Curve Fitting Question By: ftdwh on Tue, 14 September 1993 11:01
		Re: Curve Fitting Question By: David Fanning on Tue, 13 November 2012 15:24
		Re: Curve Fitting Question By: cgguido on Wed, 14 November 2012 06:22
		Re: Curve Fitting Question By: David Fanning on Tue, 20 November 2012 06:22
		Re: Curve Fitting Question By: Mark Piper on Tue, 13 November 2012 08:31
		Re: Curve Fitting Question By: David Fanning on Mon, 12 November 2012 19:40
		Re: Curve Fitting Question By: ben.bighair on Mon, 12 November 2012 18:47
		Re: Curve Fitting Question By: David Fanning on Mon, 12 November 2012 17:23
		Re: Curve Fitting Question By: David Fanning on Mon, 12 November 2012 17:18
		Re: Curve Fitting Question By: Craig Markwardt on Mon, 12 November 2012 15:51
		Re: Curve Fitting Question By: David Fanning on Tue, 20 November 2012 06:58

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