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yaph OP t1_j0bppah wrote

The colors are based on the Louvain method for community detection, the node size represents the number of influenced languages within this graph and the edges point from influencing to influenced languages. There are small arrow markers that show the direction, better visible when you zoom in on the graph on the graphic source page.

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Affectionate-Set4208 t1_j0brk2r wrote

a nice way to see the arrows direction is knowing that they always turn clockwise from their source

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yaph OP t1_j0e32he wrote

That's a very good observation, didn't even realize that myself until now.

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