Compare matrices
R's ability to deal with different data structures for comparisons does not stop at vectors. Matrices and relational operators also work together seamlessly!
Instead of in vectors (as in the previous exercise), the LinkedIn and Facebook data is now stored in a matrix called views. The first row contains the LinkedIn information; the second row the Facebook information. The original vectors facebook and linkedin are still available as well.
This is a part of the course
“Intermediate R”
Exercise instructions
Using the relational operators you've learned so far, try to discover the following:
- When were the views exactly equal to 13? Use the
viewsmatrix to return a logical matrix. - For which days were the number of views less than or equal to 14? Again, have R return a logical matrix.
Hands-on interactive exercise
Have a go at this exercise by completing this sample code.
# The social data has been created for you
linkedin <- c(16, 9, 13, 5, 2, 17, 14)
facebook <- c(17, 7, 5, 16, 8, 13, 14)
views <- matrix(c(linkedin, facebook), nrow = 2, byrow = TRUE)
# When does views equal 13?
# When is views less than or equal to 14?