perfcurve return one value

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Ezgi Aslan 2020-8-24

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https://ww2.mathworks.cn/matlabcentral/answers/583568-perfcurve-return-one-value

评论： Ezgi Aslan 2020-8-24

I used sam (spectral angle mapper) to change detection in hyperspektral image after that want to plot roc(Receiver operating characteristic) using perfcurve function but function return one value. why ? could you help me?

[Xpr,Ypr,Tpr,AUCpr] = perfcurve(hyperdata_gt,abs(result),'1'); plot(Xpr,Ypr);

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Ezgi Aslan 2020-8-24

[X,Y] = perfcurve(labels,scores,posclass); plot(X,Y);

labels are the true labels of the data, scores are the output scores from your classifier (before the threshold) and posclass is the positive class in your labels.

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