numpy random_sample()函数中的随机采样
numpy.random.random_sample()是numpy中进行随机抽样的函数之一。它返回一个指定形状的数组,并在半开区间[0.0, 1.0]内填充随机浮点数。
语法: numpy.random.random_sample(size=None)
参数 :
size : [int or tuple of ints, optional] 输出形状。如果给定的形状是,例如,(m, n, k),那么将绘制m * n * k的样本。默认为无,在这种情况下,将返回一个单一的值。
返回:区间[0.0, 1.0]的随机浮点数数组。如果没有提供大小,则为单个此类随机浮点数。
代码#1:
# Python program explaining
# numpy.random.sample() function
# importing numpy
import numpy as geek
# output random value
out_val = geek.random.random_sample()
print ("Output random float value : ", out_val)
输出 :
Output random float value : 0.9211987310893188
代码#2:
# Python program explaining
# numpy.random.random_sample() function
# importing numpy
import numpy as geek
# output array
out_arr = geek.random.random_sample(size =(1, 3))
print ("Output 2D Array filled with random floats : ", out_arr)
输出 :
Output 2D Array filled with random floats : [[ 0.64325146 0.4699456 0.89895437]]
代码#3:
# Python program explaining
# numpy.random.random_sample() function
# importing numpy
import numpy as geek
# output array
out_arr = geek.random.random_sample((3, 2, 1))
print ("Output 3D Array filled with random floats : ", out_arr)
输出 :
Output 3D Array filled with random floats : [[[ 0.78245025]
[ 0.77736746]]
[[ 0.54389267]
[ 0.18491758]]
[[ 0.97428409]
[ 0.73729256]]]