datast.m

来自「通过核来泛化的判别分析（GDA）代码」· M 代码 · 共 16 行

function r=DataSt(x)
% center and normalize the x matrix according to the mean and the standard deviation
% of the data
% x uses line vectors (data)

% Gaston Baudat & Fatiha Anouar / 21st October 2000 / Exton PA 19341 USA
% Designed under MatLab for Windows version 5.2.0.3084

[m,n]=size(x);
r=zeros(m,n);
mx=mean(x);
sd=sqrt(diag(cov(x)))';
for i=1:m
   r(i,:)=(x(i,:)-mx)./sd;
end