Github user mengxr commented on the pull request:
https://github.com/apache/spark/pull/1671#issuecomment-51375372
Thanks for explaining different approaches. What should be the best for
`HashingTF`? Adding the counts or with random signs and bounded by 0? I know
with random signs, we can preserve the structure. But I'm not sure whether this
is a standard practice for NLP.
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