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