[R] About nlminb function
Freddy Hernández
fhernanb at gmail.com
Wed Jul 4 18:37:34 CEST 2012
Hello
I want to use the nlminb function but I have the objective function like
characters. I can summarize the problem using the first example in the
nlminb documentation.
x <- rnbinom(100, mu = 10, size = 10)
hdev <- function(par) -sum(dnbinom(x, mu = par[1], size = par[2], log =
TRUE))
nlminb(c(9, 12), objective=hdev)
With the last instructions we obtain appropriate results. If I have the name
of the objective function stored in the element name, how can modify the
next two instructions to obtain the same above results?
name <- 'hdev'
nlminb(c(9, 12), objective=name)
Thanks for the reply.
Freddy.
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