pLSI in gensim

337 views
Skip to first unread message

Gerardo

unread,
Nov 3, 2012, 6:09:23 PM11/3/12
to gen...@googlegroups.com
Hello everybody.

I have a question: is pLSI implemented in gensim? If the question is yes: where can I find this in gensim?

I'd like to know this, please. 

I'm looking forward for an answer, Thanks.

Steve

unread,
Nov 7, 2012, 9:51:50 AM11/7/12
to gen...@googlegroups.com
I'm new to gensim but from looking at the documentation its a no. 

Radim Řehůřek

unread,
Nov 10, 2012, 3:16:29 PM11/10/12
to gensim
Gerardo,

gensim doesn't contain pLSI, mainly because pLSI is fully superseded
by LDA. With uniform topic priors, pLSI and LDA use essentially the
same model, so with enough training data, you'll get the same
results.

But an added advantage of LDA (apart from more flexibility w.r.t. non-
uniform priors) is that you can infer topics for previously unseen
documents, which you can't with pLSI.

HTH,
Radim
Reply all
Reply to author
Forward
0 new messages