> The Spider Objects

>            ONE_VS_ONE object

>        A=ONE_VS_ONE(C,H) returns an one_vs_one object which trains several
>        algorithm C on pairwise problems of class i against class j,
>        and is initialized with hyperparameters H. The classifiers are combined
>        by outputting the class with the most votes.

>        Model
>         child=svm            -- classifier to use for each sub-problem

>        Methods:
>         train, test, get_w

> | Reference : Multi-class Support Vector Machines

> | Author : Jason Weston , C. Watkins

> | Link : http://citeseer.ist.psu.edu/8884.html