# clm.control

##### Set control parameters for cumulative link models

Set control parameters for cumulative link models

- Keywords
- models

##### Usage

```
clm.control(method = c("Newton", "model.frame", "design", "ucminf", "nlminb",
"optim"),
sign.location = c("negative", "positive"),
sign.nominal = c("positive", "negative"),
..., trace = 0L,
maxIter = 100L, gradTol = 1e-06, maxLineIter = 15L, relTol = 1e-6,
tol = sqrt(.Machine$double.eps), maxModIter = 5L,
convergence = c("warn", "silent", "stop", "message"))
```

##### Arguments

- method
`"Newton"`

fits the model by maximum likelihood and`"model.frame"`

cause`clm`

to return the`model.frame`

,`"design"`

causes`clm`

to return a list of design matrices etc. that can be used with`clm.fit`

.`ucminf`

,`nlminb`

and`optim`

refer to general purpose optimizers.- sign.location
change sign of the location part of the model.

- sign.nominal
change sign of the nominal part of the model.

- trace
numerical, if

`> 0`

information is printed about and during the optimization process. Defaults to`0`

.- maxIter
the maximum number of Newton-Raphson iterations. Defaults to

`100`

.- gradTol
the maximum absolute gradient; defaults to

`1e-6`

.- maxLineIter
the maximum number of step halfings allowed if a Newton(-Raphson) step over shoots. Defaults to

`15`

.- relTol
relative convergence tolerence: relative change in the parameter estimates between Newton iterations. Defaults to

`1e-6`

.- tol
numerical tolerence on eigenvalues to determine negative-definiteness of Hessian. If the Hessian of a model fit is negative definite, the fitting algorithm did not converge. If the Hessian is singular, the fitting algorithm did converge albeit not to a

*unique*optimum, so one or more parameters are not uniquely determined even though the log-likelihood value is.- maxModIter
the maximum allowable number of consecutive iterations where the Newton step needs to be modified to be a decent direction. Defaults to

`5`

.- convergence
action to take if the fitting algorithm did not converge.

- …

##### Value

a list of control parameters.

##### See Also

*Documentation reproduced from package ordinal, version 2018.8-25, License: GPL (>= 2)*