getOptPathBestIndex: Get index of the best element from optimization path.

In mlr-org/ParamHelpers: Helpers for Parameters in Black-Box Optimization, Tuning and Machine Learning

Get index of the best element from optimization path.

Description

Get index of the best element from optimization path.

Usage

getOptPathBestIndex(
  op,
  y.name = op$y.names[1],
  dob = op$env$dob,
  eol = op$env$eol,
  ties = "last"
)

Arguments

op	OptPath Optimization path.
y.name	(character(1)) Name of target value to decide which element is best. Default is y.names[1].
dob	integer Vector of date-of-birth values to further subset the result. Only elements with a date-of-birth included in dob are selected. Default is all.
eol	integer Vector of end-of-life values to further subset the result. Only elements with an end-of-life included in eol are selected. Default is all.
ties	(character(1)) How should ties be broken when more than one optimal element is found? “all”: return all indices, “first”: return first optimal element in path, “last”: return last optimal element in path, “random”: return random optimal element in path. Default is “last”.

Value

integer Index or indices into path. See ties.

See Also

Other optpath: OptPath, addOptPathEl(), getOptPathCol(), getOptPathCols(), getOptPathDOB(), getOptPathEOL(), getOptPathEl(), getOptPathErrorMessages(), getOptPathExecTimes(), getOptPathLength(), getOptPathParetoFront(), getOptPathX(), getOptPathY(), setOptPathElDOB(), setOptPathElEOL()

Examples

ps = makeParamSet(makeNumericParam("x"))
op = makeOptPathDF(par.set = ps, y.names = "y", minimize = TRUE)
addOptPathEl(op, x = list(x = 1), y = 5)
addOptPathEl(op, x = list(x = 2), y = 3)
addOptPathEl(op, x = list(x = 3), y = 9)
addOptPathEl(op, x = list(x = 4), y = 3)
as.data.frame(op)
getOptPathBestIndex(op)
getOptPathBestIndex(op, ties = "first")

mlr-org/ParamHelpers documentation built on Dec. 23, 2024, 10:53 p.m.