Create a list named random with the following components: metadata, age, list1, samplegroup, and number. The benefit of this notation is that it allows indexing by vectors so you can access multiple components of the list at once. list1 will return the contents in a list form and not the original data structure. The difference is the class of the information that is retrieved. NOTE: Using the single bracket notation also works wth lists. To access multiple components of a list, see the note below. Also, it is important to note that when selecting components we can only access one at a time.
Instead, it is better to save the contents of a list component to a variable (as we did above) and further manipulate it. You can also do the same for dataframes and matrices, although with larger datasets it is not advisable.
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