Sorry I can't help, but I'd just suggest to post this on the scipy mailing list as you may get more replies there.
-=- Olivier Le 1 mars 2012 10:24, Pierre Barthelemy <bart...@gmail.com> a écrit : > Dear all, > > i am writing a program for data analysis. One of the functions of this > program gives the possibility to fit the functions. I followed the recipe > described in : h*MailScanner soupçonne le lien suivant d'être une > tentative de fraude de la part de "www.scipy.org" > *ttp://www.scipy.org/Cookbook/FittingData<http://www.scipy.org/Cookbook/FittingData> > under > the section "Simplifying the syntax". > > To fit, i use the function: > > out=optimize.leastsq(f, p, full_output=1) > > where f is my function and p a list of parameters. > > One thing that i would like to know is how can i get the error on the > parameters ? From what i understood from the "Cookbook" page, and from the > scipy manual ( > http://docs.scipy.org/doc/scipy/reference/generated/scipy.optimize.leastsq.html#scipy.optimize.leastsq), > the second argument returned by the leastsq function gives access to these > errors. > std_error=std(y-function(x)) > param_error=sqrt(diagonal(out[1])*std_error) > > The param_errors that i get in this case are extremely small. Much smaller > than what i expected, and much smaller than what i can get fitting the > function with matlab. So i guess i made an error here. > > Can someone tell me how i should do to retrieve the parameter errors ? > > Bests, > > Pierre > > PS: i got the impression something went wrong with my previous message, > sorry for that. > > > _______________________________________________ > NumPy-Discussion mailing list > NumPy-Discussion@scipy.org > http://mail.scipy.org/mailman/listinfo/numpy-discussion > >
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