Question: using R The function `readLines()` is very useful for this purpose. a. The link of ggplot2 documentation is http://docs.ggplot2.org/current/ and we would like to get

using R

The function `readLines()` is very useful for this purpose.

a. The link of ggplot2 documentation is http://docs.ggplot2.org/current/ and we would like to get the list of ggplot2 geoms from there. Write a regular expression that would extract all the geoms names (geom_bar is one of them) from this link and display the unique geoms. How many unique geoms does it have?

b.Write a regular expression that would extract all the http web links addresses from the link. Display the results that show only the http web link addresses and nothing else.

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