排序np.日期数组

Question

我有一个日期矩阵我想按日期排序然后以相同的格式返回

data = np.array(
[[2015, 1, 1, 23, 4, 59],
[2015, 4, 30, 23, 5, 1],
[2015, 1, 1, 23, 5, 25],
[2015, 2, 15, 58,5, 0],
[2015, 5, 20, 50, 27, 37],
[2015, 6, 21, 25, 27, 29]])

我试了datetime。日期时间，但无法将数据转换回此格式

Answer 1

您可以在不转换为datetime的情况下对数据进行排序，因为日期/时间组件已经按排序顺序出现(年、月等)。所以np.sort(data, axis=0)应该这样做:

import numpy as np
data = np.array(
[[2015, 1, 1, 23, 4, 59],
[2015, 4, 30, 23, 5, 1],
[2015, 1, 1, 23, 5, 25],
[2015, 2, 15, 58,5, 0],
[2015, 5, 20, 50, 27, 37],
[2015, 6, 21, 25, 27, 29]])
np.sort(data, axis=0)
array([[2015,    1,    1,   23,    4,    0],
[2015,    1,    1,   23,    5,    1],
[2015,    2,   15,   23,    5,   25],
[2015,    4,   20,   25,    5,   29],
[2015,    5,   21,   50,   27,   37],
[2015,    6,   30,   58,   27,   59]])