for i=1:6040

Ai=ratings(ratings(:,1)==i,:);

for j=1:5

Labnum(i,j)=length(Ai(Ai(:,3)==j));

end

num(i)=length(Ai(:,1));

end

num=[[1:6040]',num'];
numsort=sortrows(num,-2);

Xratings1101_1500=[];

for i=1:1501

Xratings1101_1500=[Xratings1101_1500;ratingsNew1101_518(ratingsNew1101_518(:,1)==numsort1101(i,1),:)];

end

items1101_518=ratings(ratings(:,1)==1101,2);

ratings1101_518=[];

for i=1:518

items=items1101_518(i);

ratings1101_518=[ratings1101_518;ratings(ratings(:,1)==items,:)];

end

users1101_518 = unique(ratings1101_518(:,1)');　

items1101_518=ratings(ratings(:,1)==1101,2);

ratings1101_518=[];

for i=1:518

items=items1101_518(i);

ratings1101_518=[ratings1101_518;ratings(ratings(:,2)==items,:)];

end

items1101_518=sortrows(items1101_518,1);

ratingsNew1101_518=ratings1101_518;

for i=1:518

ratingsNew1101_518(ratingsNew1101_518(:,2)==items1101_518(i),2)=i;

end

ratingsNew1101_518=sortrows(ratingsNew1101_518,2);

Xratings1101_1500=[];

for i=1:1501

Xi=ratings1101_518(ratings1101_518(:,1)==numsort1101(i,1),:);

Xi(:,1)=i;

Xratings1101_1500=[Xratings1101_1500;Xi];

end

Xratings1101_1500=[];

for i=1:1501

Xi=ratingsNew1101_518(ratingsNew1101_518(:,1)==numsort1101(i,1),:);

Xi(:,1)=i;

Xratings1101_1500=[Xratings1101_1500;Xi];

end

X1101=zeros(1501,518);

>> for i=1:size(Xratings1101_1500,1)

X1101(Xratings1101_1500(i,1),Xratings1101_1500(i,2)) = Xratings1101_1500(i,3);

end