Select elements
In the previous video, Filip explained how subsetting, using square brackets, extended from vectors to matrices. In general, the following line selects an element that's on row i and column j from a matrix m:
m[i,j]
Let's go intergalactic on subsetting now! You'll continue working on star_wars_matrix, which is still a matrix containing both US and non-US box office figures for the first three movies.
This exercise is part of the course
Introduction to R for Data Science (Microsoft)
Exercise instructions
- Select the US box office figure for "The Empire Strikes Back".
- Select the non-US box office number for "A New Hope" No need to assign these elements to new variables; simply print them.
Hands-on interactive exercise
Have a go at this exercise by completing this sample code.
# star_wars_matrix is already defined in your workspace
# US box office revenue for "The Empire Strikes Back"
# non-US box office revenue for "A New Hope"