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what is the meaning of "ROC(Threshholds)"?

lg21clg21c image Contributor II
in Help
what is the meaning of "ROC(Threshholds)"? See Picture Below

It is the result of process "Jump to Tutorial Process" of operator "Performance"

Answers

  • MartinLiebigMartinLiebig image RM Data Scientist
    Hi,
    in order to get a certain TPR/FPR (the red curve) you need to apply a certain confidence threshold. Thats the blue curve.

    Cheers,
    Martin
    - Sr. Director Data Solutions, Altair RapidMiner -
    Dortmund, Germany
  • lg21clg21c image Contributor II
    hi@mschmitz ，what is the meaning of the  x-axis of  ROC(Threshholds) curve？
  • yyhuangyyhuang image RM Data Scientist
    Hi @lg21c, the x-axis of ROC is false positive rate. We want to have a model that reach a high true positive rate while a low false positive rate, the lower the better. More definitions: http://www.damienfrancois.be/blog/files/modelperfcheatsheet.pdf
    Cheers,
    YY
  • lg21clg21c image Contributor II
    edited April 2021
    Hi@mschmitz , is the  x-axis of  ROC(Threshholds) curve false positive rate ,too? 
    seem not to be
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