Swamping and Masking in Anomaly detection: How Subsampling in Isolation Forests helps mitigate…

Swamping and Masking in Anomaly detection: How Subsampling in Isolation Forests helps mitigate this ?Isolation Forests achieve high anomaly detection performance with high efficiency with a very small subsampling size unlike most of the anomaly detection algorithms in which larger the sampling size better is the detection performance.One of my recent tasks at work was to identify fraud patterns related to returns and refund of online purchase of items. The test dataset I was dealing with was clo...

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