6-55  ʹexprndֲָݡ
>> R = exprnd(8)
R =
   13.3004
>> R = exprnd(8,4,5)
R =
   13.1427   15.1305    1.2658    1.5717    8.5842
    3.0592    2.8775    4.1729    3.5092    9.9106
    9.5584    7.7750    5.6005    1.6074    8.6024
    4.9047    1.2065    0.8449    3.3214    5.0177
>>
