repmatsam4.m

matlab实用教程

A =[1 2	3 4; -1	-2	-3	-4;0 4 2 9];

[row, col] = size(A);
for i = 1:2*row
   for j = 1:2*col
       if i >=1 && i <= row && j >= 1 && j <= col
          B(i, j) = A(i, j);
       else
          B(i, j) = 0;
       end
   end
end