Subgraph Visualization of GNN Explanations

[akash-vartak]

No description provided.

[codecov]

Codecov Report

Merging #6235 (966c49d) into master (9fa50ef) will decrease coverage by 0.21%.
The diff coverage is 28.20%.

❗ Current head 966c49d differs from pull request most recent head 86259f4. Consider uploading reports for the commit 86259f4 to get more accurate results

@@            Coverage Diff             @@
##           master    #6235      +/-   ##
==========================================
- Coverage   84.54%   84.33%   -0.22%     
==========================================
  Files         377      378       +1     
  Lines       20936    21010      +74     
==========================================
+ Hits        17701    17719      +18     
- Misses       3235     3291      +56     

Impacted Files	Coverage Δ
torch_geometric/visualization/graph.py	14.28% <14.28%> (ø)
torch_geometric/explain/explanation.py	96.84% <84.61%> (-1.99%)	⬇️
torch_geometric/visualization/__init__.py	100.00% <100.00%> (ø)

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[wsad1]

Thanks for adding this. Left some comments.

[rusty1s]

Thank you! I moved the visualization code to torch_geometric.visualization to make it re-usable outside of explanations. Also added networkx backend support in case graphviz is not installed. Hope the changes are okay for you :)

[akash-vartak]

Stating here for easy linking.
This is a PR for Issue #5631