Right approach for using ROC curve (perfcurve) ?

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From: Luigi Giaccari on 7 Feb 2010 04:58

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"MatlabBo St" <temporarybobi(a)yahoo.de> wrote in message <hfp2rr$beo$1(a)fred.mathworks.com>...
> Hi there,
>
> could anybody help me understand the right approach of using the ROC curve?
>
> I have labels '0' and '1', and truePositivies and falsePositivies. I would like to use this:
>
> [Xplot,Yplot] = perfcurve(truePositivies,falsePositivies,'1');
>
> but I dont know what kind of data do I need to feed the function.
>
> Simply,
>
> truePositivies = (Y_predicted == Y);
> falsePositivies = (Y_predicted ~= Y);
>
> doesnt help.
>
> Thank you very much in advance !

http://www.advancedmcode.org/roc-curve.html

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