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Re: errors in robust_linefit [message #92273 is a reply to message #92272]

Mon, 09 November 2015 08:26

wlandsman
Messages: 743
Registered: June 2000

Senior Member

On Monday, November 9, 2015 at 10:38:58 AM UTC-5, tfla...@gmail.com wrote:
> I guess that the coef_sig gives the error in the Yfit values....at least that's what I've got.

No the coef_sig parameter gives the error in the coefficients. Check the documentation
http://idlastro.gsfc.nasa.gov/ftp/pro/robust/robust_linefit. pro

IDL> x = findgen(10)
IDL> y = x + randomn(seed,10)*0.25
IDL> coeff = robust_linefit(x,y,yfit,sig,coef_sig)
IDL> print,coeff,coef_sig
-0.188812 1.02746
0.0756120 0.0212272

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[Message index]

		errors in robust_linefit By: tflagana on Fri, 06 November 2015 04:42
		Re: errors in robust_linefit By: wlandsman on Fri, 06 November 2015 04:54
		Re: errors in robust_linefit By: tflagana on Mon, 09 November 2015 07:38
		Re: errors in robust_linefit By: wlandsman on Mon, 09 November 2015 08:26

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