[Top][All Lists]

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

[Bug-gsl] parameters error nonlinear fit

From: Massimo Pica Ciamarra
Subject: [Bug-gsl] parameters error nonlinear fit
Date: Mon, 16 Jan 2006 19:12:10 +0100

I guess there is a bug-imprecision in the
example relative non linearfit least square fit.

In order to get an estimate of the parameter errors,
when the reduced chi square is substantially different from 1,
modify the code as follows:

double ft = sqrt(gsl_blas_dnrm2(s->f)/(n-p));
#define FIT(i) gsl_vector_get(s->x, i)
#define ERR(i) sqrt(gsl_matrix_get(covar,i,i))*ft

reply via email to

[Prev in Thread] Current Thread [Next in Thread]