Beginning R

We make a list and then select a few slices of it:

my_list <- c(3, 5, "green", 5.3, "house", 100, 1)

print(my_list[seq(2,4)])
print(my_list[seq(3,5)])
print(my_list[seq(1,1)])
print(my_list[seq(1,7,2)])
print(my_list[seq(7,1,-1)])

This selects everything from the number 2 index up to and including the number 4 index, i.e. the 2, 3 and 4 indexes:

seq(2,4)

This starts at index 3 and goes as far as index 5:

seq(3,5)

This starts at the beginning of the list and stops at index 1, giving us a list with just one item:

seq(1,1)

This starts at index 1, and goes up to index 7 in steps of 2 (so all the odd indexes)

seq(1,7,2)

This starts at index 7 and goes down to index 1 in steps of -1 (thus reversing the list)

seq(7,1,-1)