%in%

If rather than an index we want a logical that tells us whether or not each element of a first vector is in a second, we can use the function %in%. For example:

x <- c(2, 3, 5)
y <- c(1, 2, 3, 4)
x%in%y

Gives us two TRUE followed by a FALSE because 2 and 3 are in y but 5 is not.

This exercise is part of the course

Data Science R Basics

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Exercise instructions

Which of the following are actual abbreviations: MA, ME, MI, MO, MU?

Define a character vector with the abbreviations MA, ME, MI, MO, MU.
Use the %in% operator to create a logical vector that is TRUE when the abbreviation is in murders$abb.

Hands-on interactive exercise

Have a go at this exercise by completing this sample code.

# Store the 5 abbreviations in `abbs`. (remember that they are character vectors)


# Use the %in% command to check if the entries of abbs are abbreviations in the the murders data frame

Edit and Run Code