[RsR] Robust nonlinear regression in R

-----Urspr?ngliche Nachricht-----
Von: r-sig-robust-bounces at r-project.org 
[mailto:r-sig-robust-bounces at r-project.org] Im Auftrag von 
khanx131 at umn.edu
Gesendet: Sonntag, 19. Oktober 2008 20:21
An: r-sig-robust at r-project.org
Betreff: Re: [RsR] Robust nonlinear regression in R


Thanks to all, I looked into the nonlinear regression 
fitting function 
"nlrob()" available in R. the problem with it is that unless 
i don't get 
start with good starting values close to the actual one's it 
does not work. 
Is there any pointers how to choose good starting values-?

Thanks,
Dost.


On Sep 26 2008, Tobias Verbeke wrote:

From the Robust Statistical Methods Task View on CRAN
at

http://cran.r-project.org/web/views/Robust.html


" Robust Nonlinear model fitting is available through 

robustbase 's 

nlrob()."

install.packages("robustbase")
library(robustbase)
?nlrob

HTH,
Tobias

I would like to know about robust nonlinear regression R 

code as well.

Arny


Arnold J. Stromberg
Professor and Chair
Department of Statistics
University of Kentucky
817 Patterson Office Tower
Lexington, KY 40506-0027
Phone: 859-257-6115
Fax: 859-323-1973


-----Original Message----- From: 

r-sig-robust-bounces at r-project.org 

[mailto:r-sig-robust-bounces at r-project.org] On Behalf Of 
khanx131 at umn.edu Sent: Thursday, September 25, 2008 6:50 PM To: 
r-sig-robust at r-project.org Subject: [RsR] Robust 

nonlinear regression in 

R

Hi dear linsters,

I am starting work on a robust nonlinear regression 

project. Is there any

code, stuff in R for robust estimation of nonlinear 

regression functions.

any comments,material help, suggestions would be greatly 

appreciated.

thanks in advance,

Dost.