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jverbus merged 4 commits into from
Mar 24, 2026
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Add eif heatmap plots to README.md #82

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02f8018
Add Standard IF vs Extended IF score heatmap plots to README
jverbus Mar 23, 2026
8a99b3a
Update heatmap plots with improved versions
jverbus Mar 23, 2026
246d379
Update heatmap plots
jverbus Mar 23, 2026
aad4054
Update heatmap plots
jverbus Mar 23, 2026
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17 changes: 17 additions & 0 deletions README.md
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Expand Up @@ -254,6 +254,23 @@ Use `ExtendedIsolationForest` instead of `IsolationForest` when:
The standard `IsolationForest` remains a good default for high-dimensional, uncorrelated data where
axis-aligned splits are sufficient and computational cost matters.

The following heatmaps, produced using this library's `IsolationForest` and `ExtendedIsolationForest`
implementations, illustrate the difference on synthetic 2D datasets. Standard IF exhibits
axis-aligned artifacts (visible as cross-shaped high-score regions), while Extended IF eliminates
this directional bias.

<p align="center">
<img src="./assets/single_blob_heatmap.svg" alt="Single Blob: Standard IF vs Extended IF" width="85%"/>
</p>

<p align="center">
<img src="./assets/two_blobs_heatmap.svg" alt="Two Blobs: Standard IF vs Extended IF" width="85%"/>
</p>

<p align="center">
<img src="./assets/sinusoid_heatmap.svg" alt="Sinusoid: Standard IF vs Extended IF" width="85%"/>
</p>

### Extended Isolation Forest parameters

`ExtendedIsolationForest` accepts all the same parameters as `IsolationForest` (see the
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