hpandeycodeit commented on a change in pull request #432: MADLIB-1351 : Added
stopping criteria on perplexity to LDA
URL: https://github.com/apache/madlib/pull/432#discussion_r335196906
##########
File path: src/ports/postgres/modules/lda/test/lda.sql_in
##########
@@ -448,12 +456,15 @@ SELECT lda_train(
'lda_output_data', -- output_data_table
20, -- voc_size
5, -- topic_num
- 3, -- iter_num
+ 10, -- iter_num
10, -- alpha
0.01, -- beta
2, -- evaluate_every
- 10 -- perplexity_tol
+ 100 -- perplexity_tol
);
-select assert(abs(perplexity[2] - perplexity[1]) > .1, 'Perplexity toll is
less than the perplexity difference') from lda_model ;
\ No newline at end of file
+select assert(abs(perplexity[2] - perplexity[1]) <10, 'Perplexity tol is less
than the perplexity difference') from lda_model ;
Review comment:
Added test case for distinct perplexity values as discussed.
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