I may continue some prototyping of ideas here, but text2vec does almost everything I wanted to do with r2vec, and does it much better. I suggest starting there for text mining in R.
See also text2vec on github and CRAN.
Tools for vectorizing text data in R. Currently supports bag-of-words, bag-of-n-grams, and bag-of-skip-grams vectorization. Includes predict funtions, which are useful for applying vectorizations to new data.
A quick demo of the package's capabilities
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