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Non linear regression using Levenberg-Marquardt method

Marjorie Bourgoin 
Hello,

I want to fit some non linear models with the Levenberg-Marquardt
algorithm. It doesn't seem to exist any function to do this in R ( well,
maybe one does, but I'm a new user, and the only documentation I have is
"An introduction to R").
I'd like to know if this function exists, maybe throught an additionnal
package.

I'd also like to know if if I can fit my models without giving initial
estimates of the parameters. The problem is that I have to fit four non
linear models with a lots of data sets, so I can't plot the data and
guess parameters values for each of them.

Thanks for all

Marjorie

Thread (2 messages)

Marjorie Bourgoin Non linear regression using Levenberg-Marquardt method May 15 Thomas Lumley Non linear regression using Levenberg-Marquardt method May 15