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how to use log in ir

开发者 https://www.devze.com 2023-02-02 00:20 出处:网络
I am sorry if this question sounds dumb. Why does inverse document frequenc开发者_StackOverflow社区y use log? How does log help in tf/idf?AFAIK, Using a log helps normalise numbers with a geometric d

I am sorry if this question sounds dumb.

Why does inverse document frequenc开发者_StackOverflow社区y use log? How does log help in tf/idf?


AFAIK, Using a log helps normalise numbers with a geometric distribution e.g. 1 in 100, and 1 in 1000000 become 2 and 6 which are conceptually easier to manage.

Similar uses are in noise levels (db) and seismic energy (i.e. richter scale)

How does this question related to Java, C# or data-structures?

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