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 : http://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.
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