Figure 2
From: Homology-based prediction of interactions between proteins using Averaged One-Dependence Estimators
Selection of feature vectors in the half-space defined by X1. To define a FV uniquely, an arbitrary pair of proteins whose FSeq and FSeq′ values corresponded to points X 1 and X 2 in the high-dimensional feature space is first chosen. For a given pair of proteins, its FV, FSeq′′, was defined by choosing point P 1 such that cos θ = rn⋅V/|rn||V| > 0, where rn is a reference normal vector from the midpoint between X 1 and X 2 (rp) to X 1 , V is a vector from rp to P 1 , rn⋅V is the inner product of rn and V and |rn| and |V| are the length of rn and V, respectively. If cos θ = 0, one of the two possibilities was arbitrarily selected.