how to calculate Area Under ROC curve generated by NNtool?

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.

Answer 1

[Sean de Wolski]

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)

[Misha]

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)