shuffle.m

来自「偏最小二乘算法在MATLAB中的实现」· M 代码 · 共 19 行

function y = shuffle(x)
%SHUFFLE Randomly re-orders matrix rows
%  This function shuffles samples in a data file so that they
%  can be used randomly for cross validations
%  I/O format is y = shuffle(x);

%  Copyright
%  Barry M. Wise
%  1991
%  Modified by B.M. Wise, November 1993

[m,n] = size(x);
y = zeros(m,n);
ind = rand(m,1);
[a,b] = sort(ind);
for i = 1:m
y(i,:) = x(b(i,1),:);
end