comp.lang.idl-pvwave archive: archive » scattering data with MPFITFUN

Home » Public Forums » archive » scattering data with MPFITFUN

Show: Today's Messages :: Show Polls :: Message Navigator
E-mail to friend

Re: scattering data with MPFITFUN [message #84964 is a reply to message #84962]

Wed, 19 June 2013 20:51

Craig Markwardt
Messages: 1869
Registered: November 1996

Senior Member

On Wednesday, June 19, 2013 6:49:43 PM UTC-4, Nafiseh Masoumzadeh wrote:
> Hello,
>
> I have some data which I simply want to fit p[0]*x^P[1] on them, But
> I don't know I am receiving very far results!
> I am using mpfitfun like this:
>
> start=[0.001, 0.1]
> results=MPFITFUN('MYFUNCTION', x, y, err, start)
>
> I applied this function and points in MATLAB (fitting toolbox) , and I had reasonable coefficients .

MPFITFUN can solve problems like this.

What happens when you say,
YMODEL = MYFUNCTION(X, START)
Do you get sensible values for YMODEL?

You should also be checking the STATUS and ERRMSG keywords to see if there is a more informative error message.

Craig Markwardt

Report message to a moderator

[Message index]

		scattering data with MPFITFUN By: Nafiseh Masoumzadeh on Wed, 19 June 2013 15:49
		Re: scattering data with MPFITFUN By: Craig Markwardt on Wed, 19 June 2013 20:51
		Re: scattering data with MPFITFUN By: Nafiseh Masoumzadeh on Thu, 20 June 2013 01:23
		Re: scattering data with MPFITFUN By: Craig Markwardt on Thu, 20 June 2013 12:00
		Re: scattering data with MPFITFUN By: Nafiseh Masoumzadeh on Sat, 22 June 2013 14:37
		Re: scattering data with MPFITFUN By: Craig Markwardt on Sun, 23 June 2013 18:59
		Re: scattering data with MPFITFUN By: David Fanning on Sun, 23 June 2013 19:29

Previous Topic:	National Hiking Day
Next Topic:	Avoiding Loops in IDL 8.2.2

-=] Back to Top [=-

[ Syndicate this forum (XML) ] [

] [

]

Current Time: Fri Oct 10 11:39:39 PDT 2025

Total time taken to generate the page: 1.60031 seconds