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Variable Importance

User: "DDelen"
New Altair Community Member
Updated by Jocelyn
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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    User: "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
    User: "DDelen"
    New Altair Community Member
    OP
    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! :(
    User: "Andrew2"
    New Altair Community Member
    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
    User: "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.