[R] Nonlinear regression

[Bill.Venables at csiro.au]

?nls

(I always knew SAS *is* a DUD, but never that it has a DUD too...) 


Bill Venables
CSIRO Laboratories
PO Box 120, Cleveland, 4163
AUSTRALIA
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mailto:Bill.Venables at csiro.au
http://www.cmis.csiro.au/bill.venables/ 

-----Original Message-----
From: r-help-bounces at r-project.org [mailto:r-help-bounces at r-project.org]
On Behalf Of LXu at hnrg.com
Sent: Wednesday, 21 May 2008 9:23 AM
To: r-help at r-project.org
Subject: [R] Nonlinear regression

Could someone help me on the following:
SAS has DUD (Does not Use Derivatives) for nonlinear regression.

Does "R" has a similar capability?

I am not good at derivatives and may get my derivative wrong before 
feeding it to a nonlinear regression procedure.

Any help would be much appreciated. 

Liu
Hancock Forest Management NZ
Tokoroa, New Zealand 
DDI: 07-8850387
Mobile: 021-1576178
A/H: 06 868 4288
lxu at hnrg.com


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