function?classification?=?classif（Ytrain?Ytest）
%%?識別
%?classification?=?classify（Ytrain?Ytest）
%
%?Given?the?train?matrix?Ytrain?and?the?test?matrix?Ytest
%?this?function?returs?a?vector?classification?where?
%?for?Ytest（:?a）?the?nearest?element?of?Ytrain?is
%?Ytrain（:?classification（a））.

distances?=?dist（Ytrain‘?Ytest）;???%Euclidean?distance?weight?function
classification?=?zeros（size（Ytest2）1）;
for?a=1:size（Ytest2）
???aux?=?find（distances（:a）==min（distances（:a）））;
???classification（a）?=?aux（1）;
end