Github user akopich commented on the pull request: https://github.com/apache/spark/pull/1269#issuecomment-78184948 @renchengchang What do you mean by "topic vector"? A vector of p(t|d) \forall t? If so, you can find these vectors in `RDD[DocumentParameters]` which is returned by `infer(documents: RDD[Document], ...)` method. `DocumentParameters` stores a document a vector of p(t|d) \forall t which is referred as `theta`. BTW, the order of documents is remained the same.
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