用随机值创建 Numpy 数组| Python
原文:https://www . geeksforgeeks . org/create-a-numpy-array-with-random-values-python/
在本文中，我们将学习如何创建一个充满随机值的 Numpy 数组，给定数组的形状和类型。
我们可以使用 Numpy.empty()方法来完成这个任务。该方法采用三个参数，讨论如下–
-> shape : Number of rows
-> order : C_contiguous or F_contiguous
-> dtype : [optional, float(by Default)] Data type of returned array.
示例#1:
# Python Program to create numpy array
# filled with random values
import numpy as geek
b = geek.empty(2, dtype = int)
print("Matrix b : \n", b)
a = geek.empty([2, 2], dtype = int)
print("\nMatrix a : \n", a)
输出:
Matrix b :
[140489599921032 21301024]
Matrix a :
[[140489599921048 18650592]
[ 10738656 140489568798064]]
例 2:
# Python Program to create numpy array
# filled with random values
import numpy as geek
# Python Program to create numpy array
# filled with random values
import numpy as geek
c = geek.empty([3, 3])
print("\nMatrix c : \n", c)
d = geek.empty([5, 3], dtype = int)
print("\nMatrix d : \n", d)
输出:
Matrix c :
[[ 1.37596097e-316 5.39314154e-317 5.39307830e-317]
[ 5.39345774e-317 5.39345774e-317 6.93325440e-310]
[ 5.39481741e-317 6.93325440e-310 8.69555537e-322]]
Matrix d :
[[140330665569272 23735792 0]
[ 10739936 140330589556496 0]
[ 0 0 10739904]
[140330587337872 0 10915968]
[ 0 10739904 0]]
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