Rename all columns with characters

Question

I need to rename all columns in my data.frame. Right now, they are numbered 1-150 (without the X) but I would like to add "id" before each number.

Right now:

    c = data.frame(1, 2)
    names(c)[1] <- "1"
    names(c)[2] <- "2"

What I want: so that it is id1, id2 as each column name.

How can I do this?

Avoid using `c` as varname, it is a function in R. Read about `make.names`, and `paste`. Something like: `colnames(DF) <- paste0("id", colnames(DF))` should work. — zx8754, Nov 04 '19 at 07:28
`colnames(c) <- gsub("X","id",colnames(c))` or `colnames(c) <- sapply(1:ncol(c), function(k) paste0("id", toString(k)))` can get you there — ThomasIsCoding, Nov 04 '19 at 08:28

score 2 · Answer 1 · answered Nov 04 '19 at 07:29

2

You can use dplyr::rename_all()

library(dplyr)
iris %>% 
  rename_all(~ paste0("id_", .x)) %>% 
  names()

or with base R

setNames(
  iris, 
  nm = paste0(
    "id_", names(iris)
  )
) %>% names()

answered Nov 04 '19 at 07:29

Colin FAY

Please avoid answering duplicates, kindly search for existing posts before answering. – zx8754 Nov 04 '19 at 07:34

1 Answers1