python中size、shape、len的区别
size计算矩阵中所有元素的个数;
.shape返回维度值,返回一个元组
len()可以想象成数据长度/条数,即数据的行数
输入:
a = np.array([[1, 2, 3, 4], [1, 2, 3, 4]])
print(len(a))
print(a.size)
print(a.shape)
输出:
2
8
(2, 4)
参考博客(侵删):
https://blog.csdn.net/peggiehu/article/details/107004480
https://blog.csdn.net/chen_swith/article/details/107633829?utm_medium=distribute.pc_relevant.none-task-blog-baidujs_title-2&spm=1001.2101.3001.4242