Get filename without extension in R

Question

I have a file

ABCD.csv 

The length before the .csv is not fixed and vary to any length.

How can I extract the portion

Answer 1

You can try this also:

data <- "ABCD.csv"
gsub(pattern = "\\.csv$", "", data)

#[1] "ABCD"

This will be helpful in case of list of files as well, say

data <- list.files(pattern="\\.csv$") , using the code will remove extension of all the files in the list.