# check if string contains substring grepl("substring", "string") # match multiple alternatives using regexp input_string <- c("option 1", "option one") grep("option \\d+|option \\w+", input_string, value = TRUE, perl = TRUE)
# check if string contains substring grepl("substring", "string") # match multiple alternatives using regexp input_string <- c("option 1", "option one") grep("option \\d+|option \\w+", input_string, value = TRUE, perl = TRUE)