which_min: Index of the Minimum/Maximum Value, with Correction for Ties

In mlr3misc: Helper Functions for 'mlr3'

Index of the Minimum/Maximum Value, with Correction for Ties

Description

Works similar to base::which.min()/base::which.max(), but corrects for ties. Missing values are treated as Inf for which_min and as -Inf for which_max().

Usage

which_min(x, ties_method = "random", na_rm = FALSE)

which_max(x, ties_method = "random", na_rm = FALSE)

Arguments

x	(numeric()) Numeric vector.
ties_method	(character(1)) Handling of ties. One of "first", "last" or "random" (default) to return the first index, the last index, or a random index of the minimum/maximum values.
na_rm	(logical(1)) Remove NAs before computation?

Value

(integer()): Index of the minimum/maximum value. Returns an empty integer vector for empty input vectors and vectors with no non-missing values (if na_rm is TRUE). Returns NA if na_rm is FALSE and at least one NA is found in x.

Examples

x = c(2, 3, 1, 3, 5, 1, 1)
which_min(x, ties_method = "first")
which_min(x, ties_method = "last")
which_min(x, ties_method = "random")

which_max(x)
which_max(integer(0))
which_max(NA)
which_max(c(NA, 1))

mlr3misc documentation built on Sept. 13, 2025, 1:10 a.m.