Parse hyperlinks into a data frame
Have a look at the following ul list of "helpful links".
It consists of three li elements that in turn contain a elements with the links:
Helpful links
Compiled with help from Google.
The corresponding HTML code is available as a string in hyperlink_raw_html.
In this exercise, you'll parse these links into an R data frame by selecting only a elements that are within li elements.
PS: You'll use tibble(), a function from the Tidyverse, for that. tibble() is basically a trimmed down version of data.frame(), which you certainly already know. Just like data.frame(), you specify column names and data as pairs of column names and values, like so:
my_tibble <- tibble(
column_name_1 = value_1,
column_name_2 = value_2,
...
)
Latihan ini adalah bagian dari kursus
Web Scraping in R
Latihan interaktif praktis
Cobalah latihan ini dengan menyelesaikan kode contoh berikut.
# Extract all the a nodes from the bulleted list
links <- hyperlink_raw_html %>%
read_html() %>%
html_elements('li ___')