, where the difference between the classes (i.e., between 𝒚 ! and 𝒚 " ) will be maximum. Also, 𝒚 $ is a 1 × 2𝑁 $ matrix since the high-dimensional dataset (of 𝒙 $ matrix) is projected (via LDA) on a 1D line. Under these circumstances, w should be a 1 × 6 matrix.