Python中的 numpy.random.rand()
numpy.random.rand()函数创建一个指定形状的数组并用随机值填充它。句法 :
numpy.random.rand(d0, d1, ..., dn)
参数 :
d0, d1, ..., dn : [int, optional]Dimension of the returned array we require,
If no argument is given a single Python float is returned.
返回 :
Array of defined shape, filled with random values.
代码1:随机构造一维数组
Python
# 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);
Python
# 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);
Python
# 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 :
1D Array filled with random values :
[ 0.84503968 0.61570994 0.7619945 0.34994803 0.40113761]
代码2:随机构造二维数组
Python
# 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
# 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]]]
参考: https://docs.scipy.org/doc/numpy-dev/reference/generated/numpy.random.rand.html#numpy.random.rand
注意:这些代码不会在在线 IDE 上运行。因此,请在您的系统上运行它们以探索其工作原理。