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I have an idea for adding new nodes into a directed graph to achieve a numerically stable graph Fourier transform for signal analysis in the graph domain. To assess its efficiency, I am looking for real-world datasets structured as directed graphs for testing.

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    Here are two data sources lists that you can browse to find such graphs:

    • scikit-network's NetSet, in particular the wikivitals dataset;
    • Pytorch geometric datasets I don't think they all qualify as "real-world" but some of them surely do.
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