title: How to produce a list of categories based on OrdinalEncoder output?
body: <p>I've searched and have been unable to find an existing solution to the problem outlined below.</p>
  <p>I have a large list of discrete categorical data that has now been converted to numeric using OrdinalEncoder producing n=281 unique categories. To be specific, I'm looking at therapeutic areas in drug development, for example, solid tumours, influenza, rheumatoid arthritis, etc...</p>
  <p>My question is: How do I produce a list that associates an encoded category with its associated original category to infer meaning from the results of my analysis? As an example, how do I know what category 193 is out of a list of tens of thousands of observations?</p>
  <p>Clearly, with such a large list, it would be extremely difficult, so any help would be appreciated.</p>