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]]]