如何创建随机矩阵？

Question

我想创建一个随机矩阵，如[[[100,50,25]，[22,75,195]]]

我的代码是

n = 1
r = 2
e = 3

sup = []

for i in range(n):
    sup1 = []
    for c in range(r):
       sup0 = list (random.randint (200, 0, e))
       sup1.append (sup0)
    sup.append (sup1)    

print sup

但python给我错误。

Answer 1

这应该有用（不知道e做了什么）：

sup = [[random.randint(0, 200) for _ in range(r)] for _ in range(n)]

Answer 2

您可以使用numpy直接获取所需大小的随机矩阵，并使用给定范围内的值。

>>> numpy.random.randint(low = 0, high = 200, size=(2, 4))
array([[ 75,  21, 132,  90],
       [112,  11, 104, 114]])

>>> r = 2
>>> n = 1
>>> numpy.random.randint(low = 0, high = 200, size=(r, n))
array([[94],
       [51]])

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