Decision Tree

funnyhat
funnyhat New Altair Community Member
edited November 5 in Community Q&A
Hi, there.

I am a beginner of RM 5, I met a very strange thing in decision tree. my data have 468 examples, 5 regular attributes (gender, weight , length etc),2 special (one for id , one for label (true, false)), around 70 of them are true, when i try to use decision tree ,  only a false label shows, nothing else,  but the log said successfully, however if i test the golf or iris data, the results are correct.  I have no missing value.  anyone have any idea about it? is it possible related to impossible to make a cutoff?

Thanks

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Answers

  • land
    land New Altair Community Member
    Hi,
    this might be true, yes. The RapidMiner Decision tree performs two ways of pruning the tree: Before and after making splits. Might be it stops to early or prunes the tree back to the root. You should deactivate the pruning to test if the tree grows :)
    If yes, you could play around with the pruning related parameters to prevent pruning from cutting the hole tree.

    Greetings,
      Sebastian
  • funnyhat
    funnyhat New Altair Community Member
    Thanks, I think that's the point...

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