function [ seq ] = TopNinMatrix( A, TopN )
%input is any matrix
%output is Top N elements and their postions
[M,N]=size(A);
B = abs(A(:));
seq = zeros(0,3);
for i = 1:TopN
    [y,index] = max(B);
    if y == 0
        break;
    else
        B(index) = 0;
        seq(i,1) = y;
        if mod(index,M) == 0
            seq(i,2) = M;
            seq(i,3) = int32(floor(index/M));
        else
            seq(i,2) = int32(mod(index,M));
            seq(i,3) = int32(floor(index/M)+1);
        end
    end
end
% 
% CAr = round(linspace(1,M,M));
% CAc = round(linspace(1,N,N));
% MAr = repmat(CAr',1,N);
% MAc = repmat(CAc,M,1);
% MapRow = MAr(:);
% MapCol = MAc(:);
% 
% InA(:,1) = A(:);
% InA(:,2) = MapRow;
% InA(:,3) = MapCol;
% 
% seq=sortrows(InA,1);
% rseq=seq(end:-1:1,:);
%     mark = find(rseq(:,1)>0);
%     if ~isempty(mark)
%         if TopN >= mark(end)
%             out_seq = rseq(1:mark(end),:);
%             %disp('m');
%         else
%             out_seq = rseq(1:TopN, :);
%             %disp('T');
%         end
%     end
%     


end