Displaying 2 results from an estimated 2 matches for "raguenes".
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ragene
2010 Jan 13
1
Problem fitting a non-linear regression model with nls
...m each time. I know that most
of the problem comes from the choice of the initial values of the
parameters Asym_inf, Asym_inf, n1, n2, tmid1, tmid2, scal1and scal2.
My question is how could I estimate those initial values so that the nls
fitting works.
Thanks in advance
--
Nathalie YAUSCHEW-RAGUENES
Ph.D Student
Unit? de Recherches Ecologie Fonctionnelle et Physique de l'Environnement (EPHYSE)
INRA, Centre de Bordeaux - Aquitaine
71 Av Edouard Bourlaux
33883 Villenave d'Ornon Cedex
France
2010 Feb 03
1
comparison of parameters for nonlinear regression
...r the estimation of the parameters thanks to "nls", I have 2 models.
The idea is I want to compare this 2 models and particularly I want to
know if the parameters are different are not beteween this 2 models. Is
there a way to do it simply in R?
Thanks in advance
--
Nathalie YAUSCHEW-RAGUENES
Ph.D Student
Unit? de Recherches Ecologie Fonctionnelle et Physique de l'Environnement (EPHYSE)
INRA, Centre de Bordeaux - Aquitaine
71 Av Edouard Bourlaux
33883 Villenave d'Ornon Cedex
France
T?l : +33 (0)5 57 12 24 31
Fax : +33 (0)5 57 12 24 20
e-mail : nathalie.yauschew-Raguenes at bor...