Adding to a list

Once you create a list, you aren't stuck with it forever. You can add new elements to it whenever you want! Say you want to add your friend Dan's favorite movie to your list. You can do so using $ like you did when adding new columns to data frames.

my_list$dans_movie <- "StaR Wars"

my_list

$my_words
[1] "I <3 R"

$my_numbers
[1] 42 24

$dans_movie
[1] "StaR Wars"

You could have also used c() to add another element to the list: c(my_list, dans_movie = "StaR Wars"). This can be useful if you want to add multiple elements to your list at once.