Find and replace entire value in R

Question

I\'m looking for a way to use the find and replace function in R to replace the entire value of a string, rather than just the matching part of the string. I have a dataset with

Answer 1

gsub() is used to substitute a particular string with another string. In the above code, if you do the following, your whole string changes to exp

result <- gsub(string, "exp", string)

But, if you use grep() and replace(), you will achieve your desired result.

res1 <- grep("pattern",string)

gives you all the lines with the pattern and use this in replace().

res_new <- replace(string,res1,"exp")