R Tutorial – Add Quotations Or Special Characters For Elements In Vector

Original Post

R – Add Quotations Or Special Characters For Elements In Vector

Adding quotations or special characters to elements in vector, I think this a really useful feature. Especially, if you write SQL in R, this will be handy to you. Like the examples:

# SQL
# where colname in ("R", "Python", "SQL")
vec <- c("R", "Python", "SQL")
> [1] "R" "Python" "SQL"   
vec_paste <- paste0(vec, collapse = ",")
> [1] "R,Python,SQL"
# If you paste all components directly, elements won't have their own quotations.

Copy And Paste And Use

add_quotation_for_vector <- function(input, mark = "'"){
  
  len <- length(input)
  quotation <- rep(mark, times = len)
  return_vec <- paste0(quotation, input, quotation)
  
  return(return_vec)
}
# 範例
vec <- c(123, "ABC", "D")
vec2 <- add_quotation_for_vector(vec)
> [1] "'123'" "'ABC'" "'D'" 

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