ROC Curve for SVM

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berkaoui sara
berkaoui sara 2014-11-27
编辑： berkaoui sara 2014-11-27
Hi , I want to plot ROC curve for my svm results with perfcurve, and i dont know what to put exactly for labels,scores,posclass parameters, here is my code :
model=svmtrain(lab_train,train,'-t 2 -d 2 -c 7 -g 0.5');
[labeltest,valtest,prectest]= svmpredict(lab_test,test,model);
% labels are the test data labels
% scores returned by a classifier for some test data
% posclass is is the positive class label
[X,Y] = perfcurve(labels,scores,posclass);
thank you

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