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I am using autoencoder for anomaly detection in warranty data. It is unsupervised. I calculate the reconstruction error by the model and the records with high reconstruction error value is considered as an anomaly. I would like to know, if it is necessary to train/test-split the data.

Any help is much appreciated!

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Yes it is still necessary, you are fitting your model on that data and learning it to find a good representation for that sample. Validating whether or not this was actually an anomaly is a lot more difficult then.

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  • $\begingroup$ May I draw your attention to this post kindly? $\endgroup$
    – Mario
    Commented Apr 21, 2022 at 7:15

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