Re: [R] DUD (Does not Use Derivatives) for nonlinear regression in R?

2013-04-02 Thread Paul Johnson
On Apr 1, 2013 1:10 AM, qi A send2...@gmail.com wrote: Hi, All SAS has DUD (Does not Use Derivatives)/Secant Method for nonlinear regression, does R offer this option for nonlinear regression? I have read the helpfile for nls() and could not find such option, any suggestion? nelder-mead

[R] DUD (Does not Use Derivatives) for nonlinear regression in R?

2013-04-01 Thread qi A
Hi, All SAS has DUD (Does not Use Derivatives)/Secant Method for nonlinear regression, does R offer this option for nonlinear regression? I have read the helpfile for nls() and could not find such option, any suggestion? Thanks, Derek [[alternative HTML version deleted]]