如何创建一个随机矩阵? [英] How to create a random matrix?

问题描述

我想创建一个随机的矩阵，例如[[[100，50，25]，[22，75，195]]

I want create a random matrix like [[[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

但是python给我错误.

but python give me error.

推荐答案

您可以使用numpy直接获取具有给定范围内的值的所需大小的随机矩阵.

You can use numpy to directly get the random matrix of desired size with values in a given range.

>>> 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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