how to calculate Area Under ROC curve generated by NNtool?

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Misha 2014-4-16

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评论： Misha 2014-4-16

I have used nntool box to generate neural network for fault prediction. Neural network is generated by the tool, also the tool generate ROC curve. I wanted to know how to compute the AUC of this curve.

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Answer 1

Sean de Wolski 2014-4-16

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在 MATLAB Online 中打开

If you look at some of the additional syntax to perfcurve, it will give you AUC if requested:

http://www.mathworks.com/help/releases/R2014a/stats/perfcurve.html

[X,Y,T,AUC,OPTROCPT,SUBY,SUBYNAMES] = perfcurve(labels,scores,posclass)

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Misha 2014-4-16

Thanks Sean, As my ROC curve is generated by the nntool, I don't know the values for the input parameters in perfcurve function. I have read the help document but didn't understand it. It will be very helpful if u can elaborate these parameters as my ROC curve is generated using the function -plotroc(targets,outputs)

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