Re: Re: Re: Re: Re: Meaning of confusion matrix for OneR

On 4/7/09 4:33 AM, Polczynski, Mark wrote:
> Thanks Mark.  Next question:  why does OneR choose Virginica when Petal Length is missing?  I put in 4 missing values for each attribute.  I do notice that Virginica has 2 missing values for Petal Length, whereas Setosa and Versicolor only have 1 missing value for this attribute.

OneR will just use the class label that occurs most frequently when the value of
the attribute in question is missing.

Cheers,
Mark.

--
Mark Hall
Senior Developer/Consultant, Pentaho Open Source Business Intelligence
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