Algorithm 1 . Data encoding algorithm.

Input: Raw data in the form of a table or data frame

Output: Encoded data

Retains only non-null values and drops all NA-values

Reshapes the data for encoding by imputing it

Encode data using an ordinal encoder

Assign back encoded values to non-null values in the original data

Iterate through each column in the data as

for columns in category columns:

encode (data Frame[columns])

return encoded data