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Add documentation about ranges to scoring functions for Phrases #2242

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merged 2 commits into from
Dec 13, 2018
Merged

Add documentation about ranges to scoring functions for Phrases #2242

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282b1a2
phrases scorer documentation
jenishah Oct 26, 2018
b41739e
Merge remote-tracking branch 'upstream/develop' into phrases_document…
menshikh-iv Dec 13, 2018
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10 changes: 10 additions & 0 deletions gensim/models/phrases.py
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Original file line number Diff line number Diff line change
Expand Up @@ -676,6 +676,11 @@ def original_scorer(worda_count, wordb_count, bigram_count, len_vocab, min_count
corpus_word_count : int
Not used in this particular scoring technique.

Returns
-------
float
Score for given bi-gram, greater than or equal to 0.

Notes
-----
Formula: :math:`\frac{(bigram\_count - min\_count) * len\_vocab }{ (worda\_count * wordb\_count)}`.
Expand Down Expand Up @@ -703,6 +708,11 @@ def npmi_scorer(worda_count, wordb_count, bigram_count, len_vocab, min_count, co
corpus_word_count : int
Total number of words in the corpus.

Returns
-------
float
Score for given bi-gram, in the range -1 to 1.

Notes
-----
Formula: :math:`\frac{ln(prop(word_a, word_b) / (prop(word_a)*prop(word_b)))}{ -ln(prop(word_a, word_b)}`,
Expand Down