Is there any algorithm which I can use to smooth the ROC curve and maybe another algorithm to fix points which are below the reference (chance) line?

enter image description here

  • $\begingroup$ Smells like plot manipulation =) You can just use LOESS as the general smoothing algorithm. $\endgroup$ – German Demidov Oct 1 '16 at 14:36
  • $\begingroup$ @GermanDemidov Can you explain me how to calculate the new roc curve using this algorithm? Maybe a simple example? $\endgroup$ – DimChtz Oct 1 '16 at 15:04

Rufibach in arXiv:1103.1787 has, besides the description of a new smoothing method, a pretty good introduction with an overview of your options to smooth ROC curves. I suggest starting from there.

To "fix" the points below the diagonal you will need a more discriminative detector. You can't really fix bad data with statistics.

| cite | improve this answer | |

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.