Obtaining the negative example set N3 with the more iteration In figure 5, plus signs, plus signs with circle and circles denote positive examples, potential positive examples and unlabeled examples respectively. The points covered by ellipse are negative example set N3 and the line is classification hyperplane.With the new negative example set N2, the SVM classifier C2 is learned, the negative example set N3 consists of the support vectors of C2> and the unlabeled examples predicted as negative examples. The process can proceed until the condition |U| ≤ 4 * || is meet.
Chen et al. BMC Genomics 2010 11(Suppl 2):S11 doi:10.1186/1471-2164-11-S2-S11