parnames
From bbmle v1.0.23.1
by Ben Bolker
get and set parameter names
Gets and sets the "parnames" attribute on a negative log-likelihood function
- Keywords
- misc
Usage
parnames(obj)
parnames(obj) <- value
Arguments
- obj
a negative log-likelihood function
- value
a character vector of parameter names
Details
The parnames
attribute is used by mle2()
when the negative log-likelihood function takes a parameter
vector, rather than a list of parameters; this allows
users to use the same objective function for optim()
and mle2()
Value
Returns the parnames
attribute (a character vector of
parameter names) or sets it.
Examples
# NOT RUN {
x <- 1:5
set.seed(1001)
y <- rbinom(5,prob=x/(1+x),size=10)
mfun <- function(p) {
a <- p[1]
b <- p[2]
-sum(dbinom(y,prob=a*x/(b+x),size=10,log=TRUE))
}
optim(fn=mfun,par=c(1,1))
parnames(mfun) <- c("a","b")
mle2(minuslogl=mfun,start=c(a=1,b=1),method="Nelder-Mead")
# }
Community examples
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