Variable Importance

DDelen
DDelen New Altair Community Member
edited November 5 in Community Q&A
RapidMiner is great for many things except variable importance! All other major DM tools have it. That way, you can also assess the ranked ordered importance of variables in a predictive model. PLEASE!
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Answers

  • JEdward
    JEdward New Altair Community Member
    Hmmm... yes, there's nothing obvious that I can see.  Some Weka operators might have it built in.  Otherwise you may need to use something like the R caret package integrated into your RM process.  http://www.jstatsoft.org/v28/i05
  • DDelen
    DDelen New Altair Community Member
    I am not aware of variable importance on Weka or in R. I think this is what differentiates a professional tool from an experimental one. I cannot understanding the reasoning behind not including Variable Importance in RapidMiner. IT IS UNFORTUNATE! :(
  • Unknown
    Unknown
    The Weight By operators allow the influence of attributes on a label to be determined. The output is a set of weights where 1 means the attribute is relevant to the label and 0 means irrelevant.

    There is also the Optimize Weights (Forward) operator which can contain a model and this might give something that is useful.

    Andrew
  • JEdward
    JEdward New Altair Community Member
    Hi Andrew & apologies DDelen,

    At first I thought I did a quick search on the forum I found this post relating to RandomForests and Variable Importance http://rapid-i.com/rapidforum/index.php?topic=417.0 which sent me off track. 

    Hopefully that's helped you out. 

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