swh:1:snp:13ceaf33a0cf03b54a9c83ec2c853f3c4226f6da
Tip revision: c5ab0f0d83c162db9a614a6f8cc507f8a9190546 authored by Ben Bolker on 14 September 2011, 00:00:00 UTC
version 1.0.3
version 1.0.3
Tip revision: c5ab0f0
profile-methods.Rd
\name{profile-methods}
\docType{methods}
\alias{profile-methods}
\alias{profile,mle2-method}
\alias{profile.mle2}
\title{Likelihood profiles }
\description{
Create likelihood profiles for a fitted model
}
\usage{
\S4method{profile}{mle2}(fitted, which = 1:p, maxsteps = 100,
alpha = 0.01, zmax = sqrt(qchisq(1 - alpha/2, p)),
del = zmax/5, trace = FALSE, skiperrs=TRUE,
std.err,
tol.newmin = 0.001, debug=FALSE,
prof.lower, prof.upper,
skip.hessian = TRUE, try_harder=FALSE, \dots)
}
\arguments{
\item{fitted}{A fitted maximum likelihood model of class
\dQuote{mle2}}
\item{which}{a numeric or character vector describing which parameters
to profile (default is to profile all parameters)}
\item{maxsteps}{maximum number of steps to take looking for an upper
value of the negative log-likelihood}
\item{alpha}{maximum (two-sided) likelihood ratio test confidence
level to find}
\item{zmax}{maximum value of signed square root of deviance difference
to find (default value corresponds to a
2-tailed chi-squared test at level alpha)}
\item{del}{step size for profiling}
\item{trace}{(logical) produce tracing output?}
\item{skiperrs}{(logical) ignore errors produced during profiling?}
\item{std.err}{Optional numeric vector of standard errors, for cases
when the Hessian is badly behaved. Will be replicated if necessary,
and NA values will be replaced by the corresponding values from
the fit summary}
\item{tol.newmin}{tolerance for diagnosing a new minimum below the
minimum deviance estimated in initial fit is found}
\item{debug}{(logical) debugging output?}
\item{prof.lower}{optional vector of lower bounds for profiles}
\item{prof.upper}{optional vector of upper bounds for profiles}
\item{skip.hessian}{skip hessian (defunct?)}
\item{try_harder}{(logical) ignore \code{NA} and flat spots in the
profile, try to continue anyway?}
\item{\dots}{additional arguments (not used)}
}
\details{
See the vignette (\code{vignette("mle2",package="bbmle")})
for more technical details of how profiling is done.
}
\seealso{\code{\link{profile.mle-class}}}
\keyword{methods}