Hi,
I had a hard time in learning nlm in R and appreciate any help.
I encounted the following error message from time to time when I tried
different starting parameter values (three parameter values in this case) in
nlm(f=SS.fun,p=c(0.1/40,0.1,2),hessian = FALSE,N.measure=object,h=20)
Error in f(x, ...) : only 0's may mix with negative subscripts
Basically I know the three parameter values should all be positive
numbers. So, how to select appropriate starting parameter values to prevent
this kind of error message?
Thanks much
Sincerely,
Maggie Zhu
This communication is for use by the intended recipient and ...{{dropped}}
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