Replacing to tidy strings
You've seen one common strategy to pull variables out of strings is to split the string based on a pattern. Sometimes, it's easier to just replace the parts you don't want with an empty string "". This is also a common strategy to clean strings up, for example, to remove unwanted punctuation or white space.
In this exercise you'll pull out some numbers by replacing the part of the string that isn't a number, you'll also play with the format of some phone numbers. Pay close attention to the difference between str_replace() and str_replace_all().
이 연습은 강의의 일부입니다
String Manipulation with stringr in R
실습형 인터랙티브 연습
이 예제를 이 샘플 코드를 완성하여 풀어보세요.
# Some IDs
ids <- c("ID#: 192", "ID#: 118", "ID#: 001")
# Replace "ID#: " with ""
id_nums <- ___
# Turn id_nums into numbers
id_ints <- ___