Python numpy.random.rand()

Python numpy.random.rand()函数创建指定形状的数组并用随机值填充它。

语法 :

numpy.random.rand(d0, d1, ..., dn)

参数 :

d0, d1, …, dn : [int, optional]我们需要返回数组的尺寸，如果没有给出参数，则返回单个Python float。

返回 :

定义形状的数组，用随机值填充。

代码1:随机构造1D数组

# Python Program illustrating
# numpy.random.rand() method
  
import numpy as geek
  
# 1D Array
array = geek.random.rand(5)
print("1D Array filled with random values : \n", array);

输出 :

1D Array filled with random values : 
 [ 0.84503968  0.61570994  0.7619945   0.34994803  0.40113761]

代码2:随机构造2D数组

# Python Program illustrating
# numpy.random.rand() method
  
import numpy as geek
  
# 2D Array  
array = geek.random.rand(3, 4)
print("\n\n2D Array filled with random values : \n", array);

输出 :

2D Array filled with random values : 
 [[ 0.94739375  0.5557614   0.69812121  0.86902435]
 [ 0.94758176  0.22254413  0.21605843  0.44673235]
 [ 0.61683839  0.40570269  0.34369248  0.46799524]]

代码3:随机构造3D数组

# Python Program illustrating
# numpy.random.rand() method
  
import numpy as geek
  
# 3D Array    
array = geek.random.rand(2, 2 ,2)
print("\n\n3D Array filled with random values : \n", array);

输出 :

3D Array filled with random values : 
 [[[ 0.97942627  0.01068711]
  [ 0.35749073  0.22484643]]

 [[ 0.99733022  0.8029555 ]
  [ 0.44111692  0.90537128]]]