R/w2vutils.R
Transform words (or sequences of words) to vectors using a word2vec model.
h2o.transform(word2vec, words, aggregate_method = c("NONE", "AVERAGE"))
| word2vec | A word2vec model. |
|---|---|
| words | An H2OFrame made of a single column containing source words. |
| aggregate_method | Specifies how to aggregate sequences of words. If method is `NONE` then no aggregation is performed and each input word is mapped to a single word-vector. If method is 'AVERAGE' then input is treated as sequences of words delimited by NA. Each word of a sequences is internally mapped to a vector and vectors belonging to the same sentence are averaged and returned in the result. |
# NOT RUN { h2o.init() # Build a dummy word2vec model data <- as.character(as.h2o(c("a", "b", "a"))) w2v.model <- h2o.word2vec(data, sent_sample_rate = 0, min_word_freq = 0, epochs = 1, vec_size = 2) # Transform words to vectors without aggregation sentences <- as.character(as.h2o(c("b", "c", "a", NA, "b"))) h2o.transform(w2v.model, sentences) # -> 5 rows total, 2 rows NA ("c" is not in the vocabulary) # Transform words to vectors and return average vector for each sentence h2o.transform(w2v.model, sentences, aggregate_method = "AVERAGE") # -> 2 rows # }