Isolation Forest
Isolation Forest finds strange items by seeing which ones are easy to separate from the rest.
What it does
Isolation Forest finds strange items by seeing which ones are easy to separate from the rest.
Anomaly: Something broken or weird • Isolation: Being separated
How it works
- Split the data again and again.
- Count how quickly each item gets separated alone.
- Items separated very quickly may be unusual.
Uses & Applications
- A bank can flag a strange credit card purchase for review.
- A factory can notice a machine reading that looks different from normal.
- A game can spot player behavior that may need checking.
In short
It catches fraud or failing machines by finding unusual data.
Try it yourself
Find the odd dot out
Imagine cutting a number line into smaller pieces until each number is alone. Faraway numbers often need fewer cuts.
Your turn
Change one setting at a time. Reset example puts everything back.
Measure isolation depth
Step 1Why this happens