[Corpora-List] Precision and Recall

Daniel Zeman zeman at ufal.mff.cuni.cz
Fri Apr 18 07:39:54 UTC 2008


Thierry Fontenelle napsal(a):
>
> Precision: The number of correct responses divided by the total number 
> of actual responses.
>
> Recall: The number of correct responses divided by the total number of 
> possibly correct responses.
>

Alternative wording I usually tell my students:

P = number of things I correctly found / number of things I found
R = number of things I correctly found / number of things I should have 
found

("correctly found" = "I found it" AND "I should have found it")

Best
Dan


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