I have a problem to name data processing step.
- I have an attribute that contain string or null. I want to change the record of an attribute to 0 if null and 1 if not null. What preprocessing step name?
- I have an attribute that contain 200 tweets of a twitter user. I make a new attribute that describe URL ratio in 200 tweets (number of URL in 200 tweet / 200). is it aggregation or feature creation or else?