[GitHub] spark pull request: [WIP][SPARK-1405][MLLIB]Collapsed Gibbs sampli...

[allwefantasy]

Github user allwefantasy commented on the pull request:

    https://github.com/apache/spark/pull/1983#issuecomment-55129263
  
    @witgo 那就是我犯了错误，对Document 中content 
理解错了。我以为content 
是一个固定维度的向量，每个位置代表一个词，每个位置的值代表该词在文ç«
 ä¸­å‡ºçŽ°çš„次数，å…
¶å®žå°±æ˜¯è¯¯ä»¥ä¸ºæ˜¯ä¸€ä¸ªè¯é¢‘向量。所以在我的程序中，Document中content都是固定长度的一个向量，比如20000，é€
 æˆdocument 非常大。如果是你描述的那样，那么 content 
就足够稀疏，计算量和内存占用都会小很多。非常感谢。


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