Great! Let's talk about vector comparison. The comparison operators in R are:
<), <=), ==), >), >=), !=).You can use these operators to compare a vector with either a numerical value or another vector of the same size. Just as with the vector arithmetic operations we saw before, comparisons involving vectors are performed in a memberwise fashion. Thus, if you write
ages < 35R will compare each element of
ages to the value
35. The comparison returns a vector that contains
TRUE/
FALSE values. Such a vector is called a
logical vector.
ages 28 29 43 39 31 29 ... < 35 35 35 35 35 35 ... ----------------------------------------- TRUE TRUE FALSE FALSE TRUE TRUE ...
You may be wondering why we'd ever want to make these comparisons. As we'll see in the next exercise, you can use a logical vector to perform vector filtering.
Which employees are older than 35? Use a comparison operator and the vector ages to output a logical vector.
