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  3. Foundations of Functional Programming with purrr

Exercise

Subsetting list elements

You can also subset within list elements using bracket notation like this: ListName$ElementName[VectorNumber]. If a list element is a data frame, you can pull out a column like this: ListName$ElementName$ColumnName or ListName[[1]][,1].

In this exercise, you’ll examine the wesanderson and sw_films datasets from the repurrrsive package.

wesanderson contains color palettes for each of Wes Anderson's movies. These colors are recorded in hexadecimal, that is, a # followed by six digits that indicate a particular color. Here, you will be using two ways of pulling out a particular color hexadecimal.

sw_films contains information about the films in the Star Wars franchise, such as title, director, producer, etc. You'll use subsetting to explore this dataset.

Instructions 1/2

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  • 1

    Subset the third color from the first element of wesanderson. Then subset the fourth color from GrandBudapest.

  • 2

    Subset the first element from sw_films. Then subset the title element from the first element.