Python 中的 numpy.ones()
numpy.ones() 函数返回一个给定形状和类型的新数组,带有 1。
Syntax: numpy.ones(shape, dtype = None, order = 'C')
参数:
shape : integer or sequence of integers
order : C_contiguous or F_contiguous
C-contiguous order in memory(last index varies the fastest)
C order means that operating row-rise on the array will be slightly quicker
FORTRAN-contiguous order in memory (first index varies the fastest).
F order means that column-wise operations will be faster.
dtype : [optional, float(byDeafult)] Data type of returned array.
返回:
ndarray of ones having given shape, order and datatype.
# Python Program illustrating
# numpy.ones method
import numpy as geek
b = geek.ones(2, dtype = int)
print("Matrix b : \n", b)
a = geek.ones([2, 2], dtype = int)
print("\nMatrix a : \n", a)
c = geek.ones([3, 3])
print("\nMatrix c : \n", c)
输出:
Matrix b :
[1 1]
Matrix a :
[[1 1]
[1 1]]
Matrix c :
[[ 1\. 1\. 1.]
[ 1\. 1\. 1.]
[ 1\. 1\. 1.]]
Reference: https://docs . scipy . org/doc/numpy-dev/Reference/generated/numpy . Ones . html 注意:one 与零和空不同,不会将数组值分别设置为零或随机值。此外,这些代码不会在在线身份证上运行。请在您的系统上运行它们来探索工作。
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