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Numpy Attribute

blairchen
python

Publish：Dec 21, 2017
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numpy 的几种属性 维度、行列个数、元素个数

  • ndim：维度
  • shape：行数和列数
  • size：元素个数

列表转化为矩阵：

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import numpy as np

array1 = np.array(
    [
        [1,2,3],
        [2,3,4]
    ]
)
print(array1)
print('number of dim:', array1.ndim)
print('shape:', array1.shape)
print('size:', array1.size)

"""
    [[1 2 3]
     [2 3 4]]
    number of dim: 2
    shape: (2, 3)
    size: 6
"""

Reference

This blog content follows the Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) license.

The permanent link to this article is：http://www.blairee.com/2017/12/21/python/numpy-pandas/py-numpy-1-attribute/

updated on：Jun 28, 2021

Numpy

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