Fig. 9.7.

a Hyperplane formed using conventional classification algorithms for peptides with a balanced distribution. b and c Hyperplanes formed using conventional classification algorithms for peptides without balanced distribution. d Hyperplane formed using SPM for peptides without balanced distribution. The open circles represent class A, the filled circles class B, and the shaded circle class A or B. The thick lines represent the correct hyperplane for discrimination and the broken thick lines the biased hyperplanes. The thin lines represent the margin boundaries. The γ indicates the distance between the hyperplane and the boundary formed by support peptides. The margin is 2γ. Reproduced from [14] with permission.