www.gusucode.com > 超全的模式识别matlab源码程序 > code/Whitening_transform.m
function [new_patterns, train_targets, Aw, means] = Whitening_transform(train_patterns, train_targets, param, plot_on) %Reshape the data points using the whitening transform %Inputs: % train_patterns - Input patterns % train_targets - Input targets % param - Unused % plot_on - Unused % %Outputs % new_patterns - New patterns % targets - New targets % Aw - Whitening matrix % means - Means vector [r,c] = size(train_patterns); means = mean(train_patterns')'; new_patterns = train_patterns - means*ones(1,c); cov_mat = cov(new_patterns',1); Aw = inv(sqrtm(cov_mat)); new_patterns = Aw*new_patterns;