extract.m

KNN最近邻分类器和预测器

%extract.m
function [A1,A2] = extract( A ,ratio)
r = size(A, 1);
i = randperm(r);
A1 = A(i(1:r*(1-ratio)), :);
A2 = A(i(r*(1-ratio)+1:end), :);
% use 1-ratio to train and the other  to predict