Replace characters from a column of a data frame R

Question

I have a data frame

a <- runif (10)
b <- letters [1:10]
c <- c(rep (\"A-B\", 4), rep(\"A_C\", 6))
data1 <- data.frame (a, b, c)
data1
         


        

Answer 1

Use gsub:

data1$c <- gsub('_', '-', data1$c)
data1

            a b   c
1  0.34597094 a A-B
2  0.92791908 b A-B
3  0.30168772 c A-B
4  0.46692738 d A-B
5  0.86853784 e A-C
6  0.11447618 f A-C
7  0.36508645 g A-C
8  0.09658292 h A-C
9  0.71661842 i A-C
10 0.20064575 j A-C