Sure, to get the index of an element in an array in R, you can use the which() function or the indexing operator [ ]. Here are some examples:
Example 1: Using the which() function
# Create an example array
my_array <- c("apple", "banana", "cherry", "durian")
# Use which() function to get index of "cherry"
which(my_array == "cherry")
# Output: 3
Example 2: Using the indexing operator [ ]
# Create an example array
my_array <- c("apple", "banana", "cherry", "durian")
# Use indexing operator to get index of "banana"
which(my_array == "banana")
# Output: 2
Note that if the element you're looking for appears more than once in the array, which() and indexing operator will return the indices of all occurrences.