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

lg21c
lg21c New Altair Community Member
edited November 5 in Community Q&A
what is the meaning of "ROC(Threshholds)"? See Picture Below

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

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Answers

  • MartinLiebig
    MartinLiebig
    Altair Employee
    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
  • lg21c
    lg21c New Altair Community Member
    hi@mschmitz ，what is the meaning of the  x-axis of  ROC(Threshholds) curve？
  • YYH
    YYH
    Altair Employee
    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
  • lg21c
    lg21c New Altair Community Member
    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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