perClass Documentation
version 5.1 (31-May-2017)
 SDEXPAND  Expand feature space using polynomials

    P=SDEXPAND(DATA)
    P=SDEXPAND(DATA,DEGREE)

 INPUT
   DATA    a data set
   DEGREE  max polynomial degree used in the expansion (def: 2)

 OUTPUT
   P       expansion projection

 DESCRIPTION
 SDEXPAND adds dimensions using polynomial feature expansion. This allows
 us to solve non-linear problems with linear classifiers.