Fig. 2From: GSEPD: a Bioconductor package for RNA-seq gene set enrichment and projection displayVector Projection Illustration. With the origin at the cross, vector AP is projected onto vector AB, yielding the green projection. In GSEPD, the point A is the centroid of class A, and point B is the centroid of class B. Point P is any one sample. The green vector is the alpha score and the black perpendicular line from point P is the beta scoreBack to article page