numpy 随机采样 random() 用法及代码示例
numpy.random.random()
是用于在 numpy 中进行随机采样的功能之一。它返回指定形状的数组,并在half-open间隔中填充随机浮点数[0.0, 1.0).
用法:
numpy.random.random(size=None)
参数:
size : [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,将返回单个值。
**Return :**间隔中的随机浮动数组[0.0, 1.0).
如果未提供尺寸,则为单个此类随机浮动。
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)
输出:
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)
输出:
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)
输出:
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]]]
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