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Topic: get fit coefficients from fitting result
Replies: 5   Last Post: May 28, 2013 10:59 AM

 Messages: [ Previous | Next ]
 Gabriele Posts: 2 Registered: 5/25/13
Re: get fit coefficients from fitting result
Posted: May 25, 2013 6:54 PM

Hi! I have read the help of coeffvalues but I don't find how to assign to a variable the coefficients' errors that are the numbers in (,)...for example in Ben Timney's post for p2 are (-25.09, -21.93). Does anyone know a way to do it?

thanks

Gabriele

"Steven Lord" <slord@mathworks.com> wrote in message <bkf9mn\$9g8\$1@ginger.mathworks.com>...
> Ben Timney wrote:
> > This is probably really simple, but does anybody know how to get the
> > fit coefficient values from the fit result object created by the
> > curve fitting toolbox?

>
> Use COEFFVALUES.
>

> >> fittedmodel1
> fittedmodel1 =
> Linear model Poly2:
> fittedmodel1(x) = p1*x^2 + p2*x + p3
> Coefficients (with 95% confidence bounds):
> p1 = 0.006541 (0.006124, 0.006958)
> p2 = -23.51 (-25.09, -21.93)
> p3 = 2.113e+004 (1.964e+004, 2.262e+004)

> >> coeffvalues(fittedmodel1)
> ans =
> 0.00654113049422132 -23.5097459954293
> 21129.5921192366
>
> *snip*
>
> --
> Steve Lord
> slord@mathworks.com
>
>

Date Subject Author
2/6/12 Marzieh
2/6/12 Tom Lane
5/25/13 Gabriele
5/28/13 Steven Lord