paste() paste0() {base}

paste() and paste0() concatenate vectors after converting to a character.

paste (..., sep = " ", collapse = NULL) 

paste0(..., collapse = NULL)

The parameters are:

 - … : objects to be converted to a character vector

 - sep: string to separate the terms

 - collapse: optional character string to separate the results

paste():

(x = c('A', 'B', 'C'))

## [1] "A" "B" "C"

(y = c('one', 'two', 'three'))

## [1] "one"   "two"   "three"

paste(x,y, sep = "")

## [1] "Aone"   "Btwo"   "Cthree"

paste(x,y, sep = " ")

## [1] "A one"   "B two"   "C three"

paste(x,y, sep = "_")

## [1] "A_one"   "B_two"   "C_three"

(x = c('A', 'B', 'C'))

## [1] "A" "B" "C"

(y = c('1', '2', '3'))

## [1] "1" "2" "3"

paste(x,y, sep = "", collapse = " -- ")

## [1] "A1 -- B2 -- C3"

paste(x,y, sep = " ", collapse = " -- ")

## [1] "A 1 -- B 2 -- C 3"

paste0:

paste0(..., collapse) is equivalent to paste(..., sep = "", collapse).

paste0(x,y)

## [1] "A1" "B2" "C3"

paste(x,y, sep = "")

## [1] "A1" "B2" "C3"

paste0(x,y, collapse = " -- ")

## [1] "A1 -- B2 -- C3"

par(mfrow = c(1,2))
plot(iris$Species, iris$Sepal.Length, names = paste(toupper(levels(iris$Species)), "S.L.", sep = " - "), las = 2, col = 'aquamarine2', cex.axis = 0.60)
plot(iris$Species, iris$Sepal.Width, names = paste(toupper(levels(iris$Species)), "S.W.", sep = " - "), las = 2, col = 'aquamarine4', cex.axis = 0.60)