Let us start by creating the vector

# We will create a vector that includes 6 elements, and we will name the vector x
x <- c(1,5,77,34,23,12)
#Let us see how the vector looks 
x
## [1]  1  5 77 34 23 12
#Let us call the first element in vector x
x[1]
## [1] 1
#Let us call the second element
x[2]
## [1] 5
#Let us call the first through the third elements
x[1:3]
## [1]  1  5 77

What if we want to call non-consecutive elements in vector x? (this is the question that was asked in class)

# In order to call non-consecutive elements in vector x, you need to create another vector that specifies the locations of those elements and put it the brakets of vector x 
# Let us say you would like to call the frist and fourth elements 
x[c(1,4)]
## [1]  1 34

If you write x[1,4] without the function c, you will get an error error

#Let us call the second and the sixth elements 
x[c(2,6)]
## [1]  5 12

Thank you for asking questions and adding value to the calss :)