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

chartr is also convenient for these types of substitutions:

chartr("_", "-", data1$c)
#  [1] "A-B" "A-B" "A-B" "A-B" "A-C" "A-C" "A-C" "A-C" "A-C" "A-C"

Thus, you can just do:

data1$c <- chartr("_", "-", data1$c)