[R] Re ZINB by Newton Raphson??

[cahyo kristiono]

Dear Mr.Zeileis & all.

(1)     Thx for your reply. Yes, I am talk about the function zeroinfl() 
from the package "pscl". I want to use Newton Raphson to get parameter     
        estimation ZINB, so I try this:
----------------------------------------------------------------------------------------------------------------------------------
        > zinb <- zeroinfl(y ~x1+x2+x3+x4+x5|x1+x2+x3+x4+x5, data = dat, 
link="logit",dist = "negbin", method="Newton Raphson") 
Error in match.arg(method) : 
          'arg' should be one of “Nelder-Mead”, “BFGS”, 
“CG”, “L-BFGS-B”, “SANN”
-----------------------------------------------------------------------------------------------------------------------------------

        So, what is the solution (R syntax) to get estimation by Newton 
Raphson?
        Thanks
        
        Regards,
        Krist.


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