proj.m

matlab principal component analysis, PCA算法.

function y=proj(model,x)

% can proj a vector or a matrix onto a pca subspace
% 
% by guodong (http://guod.cn)
% last update: 2008-3-4
%

ww=size(x,2);
y=model.W'*(x-model.m*ones(1,ww));