rvest how to select a specific css node by id

Question

I\'m trying to use the rvest package to scrape data from a web page. In a simple format, the html code looks like this:

Answer 1

You can use xpath:

require(rvest)
text <- '

   
   
'

h <- read_html(text)

h %>% 
  html_nodes(xpath = '//*[@id="a"]') %>%
  xml_attr("value")

The easiest way to get css- and xpath-selector is to use http://selectorgadget.com/. For a specific attribute like yours use chrome's developer toolbar to get the xpath as follows: