Welcome to OGeek Q&A Community for programmer and developer-Open, Learning and Share
Welcome To Ask or Share your Answers For Others

Categories

0 votes
577 views
in Technique[技术] by (71.8m points)

r - parsing html containing   (non-breaking space)

I am using rvest to parse a website. I'm hitting a wall with these little non-breaking spaces. How does one remove the whitespace that is created by the   element in a parsed html document?

library("rvest")
library("stringr")  

minimal <- html("<!doctype html><title>blah</title> <p>&nbsp;foo")

bodytext <- minimal %>%
  html_node("body") %>% 
  html_text

Now I have extracted the body text:

bodytext
[1] " foo"

However, I can't remove that pesky bit of whitespace!

str_trim(bodytext)

gsub(pattern = " ", "", bodytext)
See Question&Answers more detail:os

与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
Welcome To Ask or Share your Answers For Others

1 Reply

0 votes
by (71.8m points)

jdharrison answered:

gsub("\W", "", bodytext)

and, that will work but you can use:

gsub("[[:space:]]", "", bodytext)

which will remove all Space characters: tab, newline, vertical tab, form feed, carriage return, space and possibly other locale-dependent characters. It's a very readable alternative to other, cryptic regex classes.


与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
OGeek|极客中国-欢迎来到极客的世界,一个免费开放的程序员编程交流平台!开放,进步,分享!让技术改变生活,让极客改变未来! Welcome to OGeek Q&A Community for programmer and developer-Open, Learning and Share
Click Here to Ask a Question

1.4m articles

1.4m replys

5 comments

57.0k users

...