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Information Retrieval

2. Unstructured data in 1650. Which plays of Shakespeare contain the words Brutus AND Caesar but NOT Calpurnia?One could grep all of Shakespeare's plays for Brutus and Caesar, then strip out lines containing Calpurnia?Slow (for large corpora)NOT Calpurnia ?????Other operations (e.g., find the wo

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Information Retrieval

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    1. 1 Information Retrieval Lecture 1: Introduction ???? ????? ??????? bug@management.ntu.edu.tw ???????Introduction to Information Retrieval??????,

    2. 2 Unstructured data in 1650 Which plays of Shakespeare contain the words Brutus AND Caesar but NOT Calpurnia? One could grep all of Shakespeares plays for Brutus and Caesar, then strip out lines containing Calpurnia? Slow (for large corpora) NOT Calpurnia ????? Other operations (e.g., find the word Romans near countrymen) not feasible Ranked retrieval (best documents to return) ??????? Brutus ???? ?? Caesar ?? Calpurnia ????????? Romans near countrymen ????Brutus ???? ?? Caesar ?? Calpurnia ????????? Romans near countrymen ????

    3. 3 Term-document incidence

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