1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
|
\name{clm2.control}
\alias{clm2.control}
\title{Set control parameters for cumulative link models}
\description{
Set control parameters for cumulative link models
}
\usage{
clm2.control(method = c("ucminf", "Newton", "nlminb", "optim",
"model.frame"), ..., convTol = 1e-4,
trace = 0, maxIter = 100, gradTol = 1e-5,
maxLineIter = 10)
}
\arguments{
\item{method}{
the optimizer used to maximize the likelihood
function. \code{"Newton"} only works for models without \code{scale},
structured thresholds and flexible link functions,
but is considerably faster than the other
optimizers when applicable. \code{model.frame} simply returns a list
of model frames with the location, scale and nominal model
frames. \code{"optim"} uses the \code{"BFGS"} method.
}
\item{\dots}{control arguments passed on to the chosen optimizer; see
\code{\link[ucminf]{ucminf}}, \code{\link{optim}}, and
\code{\link{nlminb}} for details.
}
\item{convTol}{convergence criterion on the size of the maximum
absolute gradient.
}
\item{trace}{numerical, if > 0 information is printed about and during
the optimization process. Defaults to \code{0}.
}
\item{maxIter}{the maximum number of Newton-Raphson iterations.
Defaults to \code{100}.
}
\item{gradTol}{the maximum absolute gradient. This is the termination
criterion and defaults to \code{1e-5}.
}
\item{maxLineIter}{the maximum number of step halfings allowed if
a Newton(-Raphson) step over shoots. Defaults to \code{10}.
}
}
\value{
a list of control parameters.
}
\author{Rune Haubo B Christensen}
\seealso{
\code{\link{clm2}}
}
\keyword{models}
|
