Here's a video series I made a couple of years ago on text mining with RapidMiner: http://vancouverdata.blogspot.ca/2010/11/text-analytics-with-rapidminer-load

Here's a video series I made a couple of years ago on text mining with RapidMiner: http://vancouverdata.blogspot.ca/2010/11/text-analytics-with-rapidminer-loading.html http://vancouverdata.blogspot.ca/2010/11/text-analytics-with... It's pretty easy to compare document similarity with n-grams of various lengths. Did some work with a law firm to do something similar.