有个简单方法：x = [1 0 0 0; 1 0 0 1; 0 0 0 1;0 0 0 1];x = x(:,1) * 1000 + x(:,2) * 100 + x(:,3) * 10 + x(:,4);t = tabulate([x;0.1]);t(2:end,1:2)你的矩阵每行元素有多少？
