It still amazes me that academic fields, connected by co-citation, are arranged in a ring. Is there a missing "dark field" in the middle that we will find someday to connect it all together well?pic.twitter.com/LIK8a9pqXK
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Almost every result from multidimensional scaling or related stats models I've seen yields a roughly ring-shaped result if plotted in 2-d space.
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I haven't seen that; can you point to examples?
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It's my experience that dimensionality reduction on noisy data generically gives you a blob, not a ring. If you get a ring it's usually real structure showing itself.
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And in any case this diagram has two holes, not one. I don't think that the holes represent "missing" fields. If you plotted all the locations on earth's surface with dimensionality reduction you'd see a hole, but it wouldn't represent a missing continent.
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Strongly suspect gamed or poorly sampled: eg improbable that biotech and biology only indirectly related to medicine, but brain directly connected.
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Shape here seems arbitrary - why is astrophysics near social science?
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