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

Source: R/which_max.R
which_min.Rd

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")
#> [1] 3
which_min(x, ties_method = "last")
#> [1] 7
which_min(x, ties_method = "random")
#> [1] 6

which_max(x)
#> [1] 5
which_max(integer(0))
#> integer(0)
which_max(NA)
#> [1] NA
which_max(c(NA, 1))
#> [1] NA