R str_extract()

1 개요

R str_extract()

• "Extract Matching Patterns From A String."

library("stringr")
x <- c("apple", "banana", "pear")
str_extract(x, "an")

library("stringr")
shopping_list <- c("apples x4", "bag of flour", "bag of sugar", "milk x2")
str_extract(shopping_list, "\\d")

str_extract(shopping_list, "[a-z]+")

str_extract(shopping_list, "[a-z]{1,4}")

str_extract(shopping_list, "\\b[a-z]{1,4}\\b")

2 같이 보기

• R str_extract_all()
• R stri_extract()
• R str_match()

3 참고

• https://stringr.tidyverse.org/articles/regular-expressions.html
• https://www.rdocumentation.org/packages/stringr/versions/1.4.0/topics/str_extract