ranktreecontrol {ConsRankClass}

Utility function

Description

Utility function to use to set the control arguments of ranktree

Usage

ranktreecontrol(
  num = NULL,
  decrmin = 0.01,
  algorithm = "quick",
  full = FALSE,
  itermax = 10,
  np = 15,
  gl = 100,
  ff = 0.4,
  cr = 0.9,
  proc = FALSE,
  ps = FALSE
)

Arguments

num

The maximum number of observations in a node to be split: default, 10% of the sample size

decrmin

Minimum decrease in impurity

algorithm

The algorithm used to compute the median ranking. One among"BB", "quick" (default), "fast" and "decor"

full

Specifies if the median ranking must be searched in the universe of rankings including all the possible ties. Default: FALSE

itermax

Number of iterations for "fast" and "decor" algorithms. itermax=10 is the default option.

np

(for "decor" only) the number of population individuals. np=15 is the default option.

gl

(for"decor" only) generations limit, maximum number of consecutive generations without improvement. gl=100 is the default option.

ff

(for"decor" only) the scaling rate for mutation. Must be in [0,1]. ff=0.4 is the default option.

cr

(for"decor" only) the crossover range. Must be in [0,1]. cr=0.9 is the default option.

proc

(for "BB" only) proc=TRUE allows the branch and bound algorithm to work in difficult cases, i.e. when the number of objects is larger than 15 or 25. proc=FALSE is the default option

ps

If PS=TRUE, on the screen some information about how many branches are processed are displayed. Default value: FALSE

Value

A list containing all the control parameters

Author(s)

Antonio D'Ambrosio [e-mail]

See Also

ranktree