a=zeros(10,10)；matlab中norm函數的用法、i=1;j=1;matlab中histfit函數，while i<=10while j<=10a(i,j)=normrnd(2,4);j=j+1;endi=i+1;end輸出為：a=[ -2.6033? ? 0.7369? ? 2.7789? ? 5.6589? ?-0.2654? ? 3