Saturday, September 1, 2012

inverted lists

Given a very large set of document, you can define the following relation d_i ->; w_a, w_b, w_c, ...... meaning that the document d_i contains the word w_a, w_b, w_c, and so on and so forth

Suppose you want to invert the relation and build lists such as

w_a -> d_i, d_j, d_k ...

meaning that the word w_a is contained in documents  d_i, d_j, d_k ...

how would you proceeed?

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