1. Typewriters: language models
Let's start with an elementary language processing task: spam
filtering. Its probabilistic processing involves three steps:
1. collection of a representative set of e-mails, containing a
set Dok of acceptable e-mails and a set Dko of
undesirable e-mails ;
2. construction of a numerical representation for texts. A very
simple representation transforms each e-mail d into a large binary
vector h in , with V a predefined vocabulary. For
each component, hw = 1 if the word w appears in the...
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Typewriters: language models