CSCI 5832 Natural Language Processing. Jim Martin Lecture 9. Today 2/12. Review GT example HMMs and Viterbi POS tagging. Good-Turing Intuition. Notation: N x is the frequency-of-frequency-x So N 10 =1, N 1 =3, etc To estimate counts/probs for unseen species
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Simple Good-Turing does linear interpolation in log-space. Why?
These examples from Dekang Lin