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This is Juan Julián Merelo Guervós English-language blog. He teaches computer science at the University of Granada, in southern Spain. Come back here to read about politics, technology, with a new twist

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    Inicio > Historias > Flickr and power laws

    Flickr and power laws

    Most social networks exhibit a power law in some of their aspects; so it's not surprising that Flickr would also show power law behavior somewhere. In fact, Acme looked a power laws in tag use, and Ambiguous made a reflection on a Pareto law for the visits on its Flickr stream: a few pictures gather most visits, while the bulk of the pictures just gather a few visits.
    So I started to look a it a bit systematically: first at my own stream and then at few more. Now, in English, I have data for 5 streams:
    5ajustes-flickr
    With data for 5 streams, a few patterns start to show. First, look at the line in the bottom: it's a stream with few visits, and few pictures; it does not even have 200, as the rest. It's a power law with exponent = 0.46, but there's crearly an exponential cutoff at the tail, which should be expected.
    The other streams do not follow that exponential cutoff, buth they fall into two groups: exponent ~ 0.80 (red and green), and exponent ~ 0.45 (black and blue). Curiously enough, the two latest streams were created one day apart from each other; the other two a bit after (October 2004 and January 2005). I would say there's a certain correlation between age and power law exponent, but it's not clear how it changes.
    For the time being, I'm doing this by hand; people email me a zip file with their 10 "Most popular-views" pages (and I'd be happy to get yours), but I'm looking at Fragant Disregard, and I think it could be done automatically through the Flickr API... I'll have to check that.

    2006-08-18 12:47 | 0 Comment(s) | Filed in

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