Split a column into two, using parenthesis as separator in R

I have a weird data format and I need to split a column to two.

col=c("142343-2344343(+)", "546354-4775458(-)", "374637463")

I want to split col to col1 and col2, using the first parenthesis as separator.

I want something like this

     col1                 col2       
142343-2344343            +
546354-4775458            _
374637463                  NA

I d love your help!

Try separate:

library(tidyverse)
data.frame(col) %>%
  separate(col,
          into = c("col1", "col2"),
          sep = "\\(|\\)")
            col1 col2
1 142343-2344343    +
2 546354-4775458    -
3      374637463 <NA>

We may use base R with read.csv

read.csv(text = sub("(.*)([+-])$", "\,\", 
gsub("\\(|\\)", "", col)), header = FALSE, na.strings= "", 
col.names = c("col1", "col2"))

-output

             col1 col2
1 142343-2344343    +
2 546354-4775458    -
3      374637463 <NA>

With tidyr, an option is

library(tidyr)
library(dplyr)
library(tibble)
tibble(col) %>% 
 separate_wider_regex(col, c(col1 = ".*", "\\(", var2 = "[^)]", 
    "\\)"), too_few = "align_start")

-output

# A tibble: 3 × 2
  col1           var2 
  <chr>          <chr>
1 142343-2344343 +    
2 546354-4775458 -    
3 374637463      <NA>