2/18/2012 Data Mining: Principles and Algorithms 5
Bag-of-Tokens Approaches
Four score and seven
years ago our fathers brought
forth on this continent, a new
nation, conceived in Liberty,
and dedicated to the
proposition that all men are
created equal.
Now we are engaged in a
great civil war, testing
whether that nation, or …
nation – 5
civil - 1
war – 2
men – 2
died – 4
people – 5
Liberty – 1
God – 1
…
Feature
Extraction
Loses all order-specific information!
Severely limits context!
Documents
Token Sets
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