numpy | Random()函数中的随机采样

原文:https://www . geesforgeks . org/random-sampling-in-numpy-random-function/

numpy.random.random() 是 numpy 中做随机抽样的功能之一。它返回一个指定形状的数组,并在半开间隔[0.0, 1.0).内用随机浮动填充它

语法: numpy.random.random(大小=无)

参数: 大小:【int 或 int 元组,可选】输出形状。如果给定的形状是例如(m,n,k),则绘制 m * n * k 个样本。默认值为无,在这种情况下,将返回一个值。

返回:间隔内的随机浮动数组[0.0, 1.0).或单个此类随机浮动(如果未提供大小)。

代码#1 :

# Python program explaining
# numpy.random.random() function

# importing numpy
import numpy as geek

# output array
out_arr = geek.random.random(size = 3)
print ("Output 1D Array filled with random floats : ", out_arr) 

Output :

Output 1D Array filled with random floats :  [ 0.21698734  0.01617363  0.70382199]

代码#2 :

# Python program explaining
# numpy.random.random() function

# importing numpy
import numpy as geek

# output array
out_arr = geek.random.random(size =(2, 4))
print ("Output 2D Array filled with random floats : ", out_arr) 

Output :

Output 2D Array filled with random floats :  [[ 0.95423066  0.35595927  0.76048569  0.90163066]
 [ 0.41903408  0.85596254  0.21666156  0.05734769]]

代码#3 :

# Python program explaining
# numpy.random.random() function

# importing numpy
import numpy as geek

# output array
out_arr = geek.random.random((2, 3, 2))
print ("Output 3D Array filled with random floats : ", out_arr) 

Output :

Output 3D Array filled with random floats :  [[[ 0.07861816  0.79132387]
  [ 0.9112629   0.98162851]
  [ 0.0727613   0.03480279]]

 [[ 0.11267727  0.07631742]
  [ 0.47554553  0.83625053]
  [ 0.67781339  0.37856642]]]