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My previous PCA chart was based on indexes of facial measurements, but this time I tried creating a PCA chart based on the number of shared picks between each pair of users.
The position on the x-axis might reflect the number of shared picks with other users. Edgü, Óttar, me, Love Lives, and Creoda are the users with the lowest number of shared picks with other users, and we're listed in that order on the x-axis. Parça do Neymar is the user with the most shared picks with other users, and he's listed furthest to the right on the x-axis.
The position on the y-axis might partially reflect robusticity or head size. Users with a big head tend to be low on the y-axis, like me, Sandis, Immanenz, Celestia, and Teutone. But then RatCat has one of the smallest head sizes, and he's the highest on the y-axis.
In the image below, everyone's morphs are sorted by their position on the y-axis in the image above. You can see that the first morphs have smaller head size and the last morphs have bigger head size. The last morphs also have darker skin color, but maybe it's coincidental.
The heatmap below was generated by ClustVis based on the number of shared picks (https://biit.cs.ut.ee/clustvis/).
I think the square between me and Edgü has the brightest color, because we have a high number of shared picks even though other users don't have a high number of shared picks with us. Similarly RatCat gets a bright red color with Óttar, because other users have few shared picks with Óttar. Immanenz also gets the brightest red color with me, even though he has more shared picks with Dick, Celestia, and RN97.
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