web scraping (web에서 데이터 긁어오기)
https://www.freecodecamp.org/news/an-introduction-to-web-scraping-using-r-40284110c848/
rvest 팩키지
GDP time-serise 데이터
R
100m 달리기 기록 데이터
R
Reshaping
tidyr
https://rpubs.com/bradleyboehmke/data_wrangling https://onesixx.com/dplyr/ tidyr gather(), spread() unite(), separate() dplyr row filter(), distinct(), arrange() sample_n(), slice_sample(), sample_frac() group_by(), summarise(), summarise_each() column select(), mutate() two table join(), right_join() etc. rename() tibble rownames_to_column gather() vs. spread() https://statkclee.github.io/r-novice-gapminder/14-tidyr-kr.html unite() vs. Read more…
