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[SOLVED] Optimizing Metacost Matrix operator

jforrjforr Member Posts: 7 Contributor II
edited November 2018 in Help
I'm trying to use the metacost operator to overguess on one of my labels, while keeping the false positives to a reasonable level.  Is there a way of optimizing the matrix inputs?

Alternatively, are there any other general suggestions for optimizing recall at the expense of precision for a particular label in a binary label dataset?

Best Answer

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    MariusHelfMariusHelf RapidMiner Certified Expert, Member Posts: 1,869 Unicorn
    Solution Accepted

    if you know which recall you want to achieve, you can use Select Recall and Apply Threshold.

    You can't set the values of the cost matrix directly; however you could substitute them by macros, place Set Macro operators before the MetaCost operator (inside the Optimization operator), and optimize the value fields of the Set Macro operators.



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    jforrjforr Member Posts: 7 Contributor II
    Thanks, I think that should work.
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