Sequences and length
The second argument of the function seq is actually a maximum, not necessarily the end. So if we type
seq(7, 50, 7)
we actually get the same vector of integers as if we type
seq(7, 49, 7)
This can be useful because sometimes all we want are sequential numbers that are smaller than some value.
Let's look at an example.
This exercise is part of the course
Data Science R Basics
Exercise instructions
Create a vector of numbers that starts at 6, does not go beyond 55, and adds numbers in increments of 4/7. So the first three numbers will be 6, 6+4/7, and 6+8/7. How many numbers does the list have? Use only one line of code to answer both questions.
Hands-on interactive exercise
Have a go at this exercise by completing this sample code.
# We can create a vector with the multiples of 7, smaller than 50 like this
seq(7, 49, 7)
# But note that the second argument does not need to be the last number
# It simply determines the maximum value permitted
# so the following line of code produces the same vector as seq(7, 49, 7)
seq(7, 50, 7)
# Create a sequence of numbers from 6 to 55, with 4/7 increments and determine its length