find the kth least common element in an array in r

One way to find the kth least common element in an array is to sort the array in ascending order and count the frequency of each unique element using the table() function. Once we have the frequencies of each unique element, we can sort them in ascending order and return the kth element.

Here's the code to find the kth least common element in an array in R:

main.r
# Sample array
arr <- c(1, 2, 3, 2, 4, 3, 1, 5, 1)

# Sort the array in ascending order
arr_sorted <- sort(arr)

# Count the frequency of each unique element using table()
freq_table <- table(arr_sorted)

# Sort the frequencies in ascending order
freq_sorted <- sort(freq_table)

# Find the kth least common element
kth_least_common <- names(freq_sorted)[k]
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In the above code, we first define a sample array arr. We then sort the array in ascending order using the sort() function and store it in a new variable arr_sorted. We then count the frequency of each element in the sorted array using the table() function and store it in freq_table. Finally, we sort the frequencies in ascending order using the sort() function and get the name of the kth least common element using names(freq_sorted)[k].