forked from Snailclimb/python
-
Notifications
You must be signed in to change notification settings - Fork 0
Expand file tree
/
Copy pathcreatArray.py
More file actions
37 lines (35 loc) · 1.15 KB
/
creatArray.py
File metadata and controls
37 lines (35 loc) · 1.15 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
# -*- coding: utf-8 -*-
"""
Created on Mon Mar 12 14:13:32 2018
@author: Snailclimb
@description： numpy库创建数组的一些方法
"""
import numpy as np
from numpy.matlib import randn
print("创建一维数组：")
data1 = [3, 3.3, 9, 5, 6]
arr1 = np.array(data1)
print(arr1)
print("创建二维数组:")
data2 = [[1, 2, 3, 4], [5, 6, 7, 8]]
arr2 = np.array(data2)
print(arr2)
# Type of data in array.
print("输出第一个数组的数据类型:",arr1.dtype)
print("输出第二个数组的维数:",arr2.ndim)
print("输出第三个数组的形状:",arr2.shape)
#用zeros函数创建数组
print("np.zeros(10)创建10个元素都是0的一维数组： ")
print(np.zeros(10))
print("np.zeros((3, 6))创建3行6列都是0的二维数组：")
print(np.zeros((3, 6)))
#用Empty函数创建数组，其初始值为乱值
print("np.empty((3,6))创建3行6列都是0的二维数组：")
print(np.empty((3,6)))
#用arrange函数创建数组
print("np.arange(9)创建一维数组：")
print(np.arange(9))
#用随机函数randn创建二维数组，7行4列
print("randn(7, 4))创建数字随机的一维数组：")
data = randn(7, 4)
print(data)