309069 (11) [Avatar] Offline
I'm looking for more information on the Structure of Instances (Fig 1.4, page 8 ) in particular the LibSVM syntax described: class label, feature vector [feature ID, feature value]. I've tried to Google the key words but I end up with Support Vector Machine-related stuff ...
Can you please provide some links and/or bibliography on this subject ?
Thank you in advance
Jeff Smith (14) [Avatar] Offline
The LibSVM format was originally developed for use in a support vector machines library called LibSVM, but it's now used as generally supported sparse format for representing instances. I discuss this a bit in the forthcoming Chapter 5.

There's not much to it, but here's some basic info, which should help you understand how it's used before Chapter 5 is released: