vecdist.m

一个matlab的工具包,里面包括一些分类器 例如 KNN KMEAN SVM NETLAB 等等有很多.

function dist = vecdist(X_train_vec, X_test_vec, disttype)

switch(disttype)
case 0
    dist = sum(sqrt((X_train_vec - X_test_vec).*(X_train_vec - X_test_vec)));
case 1
    plusdist = (X_train_vec + X_test_vec);
    plusdist = plusdist + (plusdist == 0) * 1e-8;
    minusdist = (X_train_vec - X_test_vec); 
    dist = sum(minusdist.*minusdist./plusdist); % chi2 distance
end;