R - how to replace parts of variable strings within data frame

Question

I have a dataframe df:

var1 var2
\"test\" \"testing\"
\"esten\" \"etsen\"
\"blest\" \"estten\"

Now I want to delete all \"t\" inside df to

Answer 1

Use gsub

dat <- c("test", "testing", "esten", "etsen", "blest", "estten")

gsub("t", "", dat)
[1] "es"    "esing" "esen"  "esen"  "bles"  "esen" 

Answer 2

You can do this with gsub and using sapply to apply it per variable:

df <- data.frame( 
    var1 = c("test","esten","blest"),
    var2 = c("testing","etsen","esttem"))

df2 <- as.data.frame(sapply(df,gsub,pattern="t",replacement=""))
df2
  var1  var2
1   es esing
2 esen  esen
3 bles  esem