In Julia, one way to get the unique elements of an array is to use the unique() function. Here's an example:
# Creating an array with repeated elements
arr = [2, 4, 6, 2, 8, 4, 1, 2, 6]
# Using the unique() function to get the unique elements
unique_arr = unique(arr)
# Printing out the unique elements
println(unique_arr) # Output: [2, 4, 6, 8, 1]
In the example above, we first created an array arr that contains repeated elements. We then used the unique() function to get an array of the unique elements, which we stored in the unique_arr variable. Finally, we printed out the unique_arr variable to see the unique elements of the original array.
Note that the unique() function preserves the order of the elements in the original array. If you don't care about the order, you can use the Set() function to get a set of the unique elements instead:
# Creating an array with repeated elements
arr = [2, 4, 6, 2, 8, 4, 1, 2, 6]
# Using the Set() function to get the unique elements
unique_set = Set(arr)
# Printing out the unique elements
println(unique_set) # Output: Set([4, 2, 6, 8, 1])
In this example, we used the Set() function to get a set of the unique elements of the original array. Note that the elements in the set may be in a different order than the original array.