Constructing pointwise mutual information directly from sparse matrix

[kaushikacharya]

In R/word2vec_fit.R # construct_pmi()
do we really need to convert input sparse matrix into a regular matrix?
As more and more CUIs are considered, this will lead to exceeding the memory limit of the m/c.

I have made changes in my forked repo to construct pmi directly using sparse matrix:
kaushikacharya@c33492d

If you want I can create a pull request.

[bkompa]

Hi there,

Thanks for your interest in the project -- your fork looks great. We'd welcome a PR.

[kaushikacharya]

@bkompa
Pull Request created: #2