%KNN?classifiers?
%training?is?training?set?testing?is?test?set?
%D?is?the??distance?D=1?is?mandistance;?D=2?is?歐氏距離?D=3是?infinite?norm
%?K?is?the?number?of?selected?neighbors
function?label=KNN（trainingtestingDK）
[row?column]=size（training）;
[row1?column1]=size（testing）;
%計(jì)算測(cè)試集與訓(xùn)練集的距離
%數(shù)據(jù)標(biāo)準(zhǔn)化
Tr_m=min（training）;
Tr_s=max（training）;
Tr=[];
Te=[];
for?i=1:（column-1）
????Tr_mi=（training（:i）-Tr_m（i））/Tr_s（i）;
????Te_mi=（testing（:i）-Tr_m（i））/Tr_s（i）;
????Tr=[TrTr_mi];
????Te=[TeTe_mi];
end
training=[Trtraining（:column）];
testing=Te;
%%%%%計(jì)算距離%%%%%%%%%%%%%%%%%%
distance=[];
if?D==1
???for?i=1:row1
????????for?j=1:row
????????????temp=[training（j[1:（column-1）]）;testing（i:）]‘;
????????????d=mandist（temp）;
????????????distance（ij）=d（12）;
????????end
????end
end
if?D==2???
???for?i=1:row1
????????for?j=1:row
??????