One Class SVM not working

Question

Andrea Lanza 2023 年 11 月 25 日

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この質問への直接リンク

https://jp.mathworks.com/matlabcentral/answers/2052577-one-class-svm-not-working

回答済み: Angelo Yeo 2023 年 11 月 30 日

ocsvm_error.png

Hi all, I have to train a one class SVM for anomaly detection. I have a dataset with two features. I trained the model on normal instances with ocsvm function. What I don't understand are the contour lines for the ocsvm scores... I do not expect those to be like that. In the figure are represented the normal instances in the space (feature1, feature2) and the contour lines corresponding to some values of ocsvm score. They are simply absurd, not like the example see on the matlab guide. I would expect ellipsoidal contour lines, not these! Any help? Thank you!