Both youtube and amazon visualization show very nice clustering. In case of technical books they cluster into, e.g., beginners, intermediate, advanced book groupings. It's impossible to notice that without the graph visualization.
That's right! I love the discovery part of these visualizations. It helped me to find proper books many times - the graph drawing library is a result of such discovery.
I wanted to learn JavaScript. So I read a book recommended by my old Silverlight-based visualization, and developed the library.
http://www.yasiv.com/amazon#/Search?q=data%20mining&cate...
Both youtube and amazon visualization show very nice clustering. In case of technical books they cluster into, e.g., beginners, intermediate, advanced book groupings. It's impossible to notice that without the graph visualization.