PCA에서 최적 PC 개수를 정하기 위한 Cross-validation 방법 December 24, 2019 in paper 1. Row-wise cross-validation CV(k)=N∑i=1||xi−ξfiT||2 =∑i=1N||xi−ξ(xTiξ)T||2 where ξ is a PC function(PC loading) with k eigenvectors and fi is ith PC score with k components. xi를 predict하는 Continue reading