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Re: xerr [message #64273 is a reply to message #64272]

Wed, 17 December 2008 14:34

laxsri
Messages: 6
Registered: November 2008

Junior Member

Hi,
>
> Well, since it's a linear problem you should probably choose a linear
> solution, not mpfitfun. Also, you need to take into account the
> variance and covariance for both x and y, so you need to solve this
> with care.

I was also intending to fix the intercepts and calculate the gradients
and uncertainties. That is why I chose mpfitfun.
I used fitexy to obtain the best fit line with uncertainties in both
intercept and gradient.

> If you google "fitting a straight line when both variables are subject
> to error" you'll get a lot of info:http://tinyurl.com/54m8l3

Thanks for the link!

Lakshmi

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[Message index]

		Re: xerr By: laxsri on Wed, 17 December 2008 14:41
		Re: xerr By: laxsri on Wed, 17 December 2008 14:34
		Re: xerr By: pgrigis on Wed, 17 December 2008 14:08
		Re: xerr By: Vince Hradil on Wed, 17 December 2008 13:29
		Re: xerr By: Craig Markwardt on Thu, 18 December 2008 19:24
		Re: xerr By: Jeremy Bailin on Thu, 18 December 2008 06:49
		Re: xerr By: wlandsman on Thu, 18 December 2008 05:31

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