how do create test label?

hai...i tried to run the kNN matlab code;

function [acc,score]=kNN(train,trainlabel,test,testlabel,k)
%train,trainlabel,test,testlabel
%return "accuravy rate"

N_tr=size(train,1);
N_ts=size(test,1);
Answer=zeros(N_ts,1);

for i=1:N_ts
    % calc distance^2 between all train data and a test data
    Temp=train-ones(N_tr,1)*test(i,:);
    Distance2=sum(Temp.^2,2);
    
%     [MIN I]=min(Distance2);
% 	Answer(i)=trainlabel(I);
    
    neibors=sortrows([Distance2,trainlabel],1);
    Answer(i)=mode(neibors(1:min(k,size(neibors,1)),2));
end

%[ANS testlabel];
acc=(1-nnz(Answer-testlabel)/N_ts)*100;
score=(Answer-testlabel==0);

how do i create the train label?(please see my 'DATA.txt' attachment).

my DATA.txt contains 5 X 10 matrix. each row represent class1~class5.