Hyperparameters of LDA

lambamanika07lambamanika07 Member Posts: 10 Contributor I
Can someone please interpret this graph for me? I find out the alpha value for the different number of topics to find the optimal number of topics which would be required to fir the corpus of data I have.What I could make of this graph is that my corpus is stabilizing at 50 topics. 1 value of alpha means 1 topic per document. Do we want to have 1 topic for each document for our corpus?

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  • lambamanika07lambamanika07 Member Posts: 10 Contributor I
    Thank you for your reply. Can you please tell me how to conduct perplexity test in LDA?
  • mschmitzmschmitz Administrator, Moderator, Employee, RapidMiner Certified Analyst, RapidMiner Certified Expert, University Professor Posts: 2,111  RM Data Scientist
    Hi @lambamanika07
    perplexity is part of the performance vector which is returned at the per port of LDA.
    BR,
    MArtin
    - Head of Data Science Services at RapidMiner -
    Dortmund, Germany
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