To get the first and last element of an array in R, you can use the indexing operator [] combined with the functions head() and tail():
Here is an example:
#creating an array with 6 numeric values
my_array <- c(13, 45, 28, 78, 92, 55)
#getting the first element of the array
first_element <- my_array[1]
#getting the last element of the array
last_element <- my_array[length(my_array)]
print(first_element)
#Output: 13
print(last_element)
#Output: 55
Alternatively, you can make use of head() and tail() functions for the same:
#creating an array with 6 numeric values
my_array <- c(13, 45, 28, 78, 92, 55)
#getting the first element of the array using head function
first_element <- head(my_array,1)
#getting the last element of the array using tail function
last_element <- tail(my_array,1)
print(first_element)
#Output: 13
print(last_element)
#Output: 55
In both cases, first_element and last_element store the first and last element of the array my_array respectively.