weighting scheme

[Siamak Barzegar]

Dear Sir/Madam,

I am new user for SSpace,

I want to you for RandomIndexing(RI) and LSA methods, you use Weighting Schema? if yes, which schema? and also can i change it? where is it?

Sincerely,

Siamak

[David Jurgens]

Hi Siamak,

  RandomIndexing does not have a weighting schema, though you have an idea for one, we can try to add it.

  LSA has several weighting schemas: log-entropy, tf-idf, and none.   All the weighting schemes are instances of the Transform interface, which is applied to the term-document matrix before the SVD is performed.  To change the weighting scheme, you'll need to create an instance of a Transform object and pass that to the LatentSemanticAnalysis constructor.  

  Does that work for you?

  Thanks,

  David

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