string-substitution

With a regular expression and the function gsub(): group <- c(“12357e”, “12575e”, “197e18”, “e18947”) group [1] “12357e” “12575e” “197e18” “e18947” gsub(“e”, “”, group) [1] “12357” “12575” “19718” “18947” What gsub does here is to replace each occurrence of “e” with an empty string “”. See ?regexp or gsub for more help.