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Inspired by a previous meta question on tag trending, my 'sunday afternoon' project was to plot the relationship between the most popular tags on Stack Overflow. The result is quite pretty:

Tag relationship graph

You can play with an interactive version on my blog. I have published the sourcecode for this control on codeproject. Enjoy!

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Did you look at other approaches to graph layouts besides the circle? –  Flexo Feb 20 '12 at 13:30
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As pretty as it looks - I'm still not gonna install SilverLight... ;) –  Lix Feb 20 '12 at 13:33
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@Lix why not? Do you not have Flash installed either? –  ChrisF Feb 20 '12 at 15:09
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@ChrisF - Sadly in our day and age one does not simply uninstall flash. Too many sites depend on it. Silverlight on the other hand, is not a requirement in most cases. It can produce some great stuff - no doubt - but no sites I use on a daily/weekly/yearly basis require Silverlight. Also installing it on Linux makes me feel all icky and hypocritical :P –  Lix Feb 20 '12 at 15:15
    
@awoodland I must admit, I didn't. I was inspired by various other cicrular relationship graphs I have found online. Can you think of a better way of representing this data? –  ColinE Feb 20 '12 at 15:44
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I was thinking something like: en.wikipedia.org/wiki/… - blow the top 40 tags things and run it for all tags with more than N questions perhaps. –  Flexo Feb 20 '12 at 15:50
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@awoodland thanks for the reference; the results you link to look very nice. However, I am not sure that method of rendering helps you to draw any conclusions from the data - the main goal of this approach, as described in Wikipedia, is to render the data in an "aesthetically pleasing way". I think the circular representation I have opted for hopefully makes it easier to understand the data and draw conclusions from it. Although, it does look pretty too :-P –  ColinE Feb 20 '12 at 16:02
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@Lix: Neither my iPhone nor my MacBook Pro have Flash installed. I don't miss it. –  Cody Gray Feb 21 '12 at 2:34
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@Cody - neither my mobile device nor my personal computers are apple products... I don't miss it. ;) –  Lix Feb 21 '12 at 8:14
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Nicely done, @Colin! –  Shog9 Mar 8 '12 at 17:28
    
Is there an R interface for the Stack API? –  Glenn Strycker Apr 3 '13 at 13:45

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