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Finding an incorrect grading pattern

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Finding an incorrect grading pattern

I was given a labelled data set and I was told few of the labels are wrongly assigned, i.e. some of the data were graded inaccurately. I'm supposed to find which ones. Which tool in RapidMiner should I use?

I tried the operator Find Outliers (Density), but somehow I feel that is not the one I'm looking for.

Thank you very much for advice. Markéta

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2 REPLIES
RMStaff

Re: Finding an incorrect grading pattern

Here is an idea: you could train a model on the data set which is generalizing well (no overfitting, no k-nn with 1 neighbor only, you get the idea...) and then apply this model to the training data set again.  Whenever the prediction differs from the label, this could be a good candidate for wrongly labeled.

 

Just my 2c,

Ingo


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Elite III

Re: Finding an incorrect grading pattern

Another potenial approach would be to run a clustering analysis on the labeled classes separately and then look for individual outliers that way.  

 

 

Brian T., Lindon Ventures - www.lindonventures.com
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