Pre-processing is some form of data manipulation or data cleaning performed prior to the main data analysis algorithms. For example, in natural language processing this might involve stripping punctuation from text to turn it into a stream of words.
Used on Chap. 8: page 155; Chap. 9: pages 178, 189; Chap. 12: page 276; Chap. 14: pages 318, 333, 334, 336
Also known as pre-processor