imptree_control: Control parameters for generating imptree objects
In imptree: Classification Trees with Imprecise Probabilities

Description Usage Arguments Details Value Author(s) See Also Examples

Initializing and validating the tree generation parameters

1 2	imptree_control(splitmetric, controlList = NULL, tbase = 1, gamma = 1, depth = NULL, minbucket = 1L, ...)

`splitmetric`	Choosen split metric as integer: `0` means `"globalmax"` and `1L` `"range"`, repectively. See `imptree_params`
`controlList`	Named list containing the processed arguments. See details.
`tbase`	Value that needs to be at least attained to qualify for splitting (default: 1)
`gamma`	Weighting factor of the maximum entropy (default: 1)
`depth`	Integer limiting the tree to the given depth, with `0` indicating to perform no splitting at all. If not supplied, `NULL` (default) or negative the tree is grown to maximal size, the latter triggering a warning.
`minbucket`	Positive integer as minimal leaf size (default: 1)
`...`	Argument gobbling; is not processed

The argument controlList may be a named list with names in c("tbase", "gamma", "depth", "minbucket") Any values in this list will overwrite those supplied in named arguments. When controlList = NULL (default) only the supplied arguments are checked.

In case controlList contains an argument named splitmetric, this will be ignored. If splitmetric is 0L, i.e. "globalmax", the values for gamma and tbase are set to their default values, even if the user supplied different values.

A list containing the options. Missing options are set to their default value.

Paul Fink Paul.Fink@stat.uni-muenchen.de

imptree, imptree_params

## Check performed for splitmetric 'globalmax',
## tbase' is default generated and 'gamma' is overwritten
## (see Details), tree is grown to full depth and 
## at least 5 observations are needed to be within each node
imptree_control(splitmetric = 0, gamma = 0.5,
                depth = NULL, minbucket = 5)

## Passing some control arguments in a list
## As splitmetric is 'range', gamma is respected
imptree_control(splitmetric = 1, minbucket = 5,
                controlList = list(gamma = 0.5, depth = NULL))