uniques: Strict version of unique (without ...).

In WinVector/wrapr: Wrap R Tools for Debugging and Parametric Programming

Strict version of unique (without ...).

Description

Check that ... is empty and if so call base::unique(x, incomparables = incomparables, MARGIN = MARGIN, fromLast = fromLast) (else throw an error)

Usage

uniques(x, ..., incomparables = FALSE, MARGIN = 1, fromLast = FALSE)

Arguments

x	items to be compared.
...	not used, checked to be empty to prevent errors.
incomparables	passed to base::unique.
MARGIN	passed to base::unique.
fromLast	passed to base::unique.

Value

base::unique(x, incomparables = incomparables, MARGIN = MARGIN, fromLast = fromLast)

Examples

x = c("a", "b")
y = c("b", "c")

# task: get unique items in x plus y
unique(c(x, y))   # correct answer
unique(x, y)      # oops forgot to wrap arguments, quietly get wrong answer
tryCatch(
   uniques(x, y), # uniques catches the error
   error = function(e) { e })
uniques(c(x, y))  # uniques works like base::unique in most case

WinVector/wrapr documentation built on Aug. 29, 2023, 4:51 a.m.