在R之中可以用rvest進行網路爬蟲， url 表示你要抓取資料的連結， read_html(url) %>% html_nodes("section p") %>% html_text() 表示去抓取這連結底下，標籤section底下的標籤p...
When processing data using for loop, you would want to know the process rate. You can use print , cat or txtProgressBar . print and c...
When processing data, sometimes we need to remove beginning or ending spaces (or even other kinds of punctuation) in string. In R, as can ...
