class07-start-vector

class07-start-vector - Term frequency tf-idf weighting The...

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Unformatted text preview: Term frequency tf-idf weighting The vector space Overview 1 Term frequency 2 tf-idf weighting 3 The vector space 1 / 45 Term frequency tf-idf weighting The vector space Outline 1 Term frequency 2 tf-idf weighting 3 The vector space 2 / 45 Term frequency tf-idf weighting The vector space Ranked retrieval Thus far, our queries have all been Boolean. 3 / 45 Term frequency tf-idf weighting The vector space Ranked retrieval Thus far, our queries have all been Boolean. Documents either match or don’t. 3 / 45 Term frequency tf-idf weighting The vector space Ranked retrieval Thus far, our queries have all been Boolean. Documents either match or don’t. Good for expert users with precise understanding of their needs and the collection. 3 / 45 Term frequency tf-idf weighting The vector space Ranked retrieval Thus far, our queries have all been Boolean. Documents either match or don’t. Good for expert users with precise understanding of their needs and the collection. Also good for applications: Applications can easily consume 1000s of results. 3 / 45 Term frequency tf-idf weighting The vector space Ranked retrieval Thus far, our queries have all been Boolean. Documents either match or don’t. Good for expert users with precise understanding of their needs and the collection. Also good for applications: Applications can easily consume 1000s of results. Not good for the majority of users. 3 / 45 Term frequency tf-idf weighting The vector space Ranked retrieval Thus far, our queries have all been Boolean. Documents either match or don’t. Good for expert users with precise understanding of their needs and the collection. Also good for applications: Applications can easily consume 1000s of results. Not good for the majority of users. Most users are not capable of writing Boolean queries (or they are, but they think it’s too much work). 3 / 45 Term frequency tf-idf weighting The vector space Ranked retrieval Thus far, our queries have all been Boolean. Documents either match or don’t. Good for expert users with precise understanding of their needs and the collection. Also good for applications: Applications can easily consume 1000s of results. Not good for the majority of users. Most users are not capable of writing Boolean queries (or they are, but they think it’s too much work). Most users don’t want to wade through 1000s of results. 3 / 45 Term frequency tf-idf weighting The vector space Ranked retrieval Thus far, our queries have all been Boolean. Documents either match or don’t. Good for expert users with precise understanding of their needs and the collection. Also good for applications: Applications can easily consume 1000s of results. Not good for the majority of users....
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This note was uploaded on 01/21/2011 for the course CSCP 689 taught by Professor James during the Spring '10 term at Texas A&M.

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class07-start-vector - Term frequency tf-idf weighting The...

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