问题描述
在 Python 中,numpy.unique 可以非常有效地从一维数组中删除所有重复项.
In Python numpy.unique can remove all duplicates from a 1D array, very efficiently.
1) 如何删除二维数组中的重复行或列?
1) How about to remove duplicate rows or columns in a 2D array?
2) nD 数组怎么样?
推荐答案
如果可能我会使用 pandas.
If possible I would use pandas.
In [1]: from pandas import * In [2]: import numpy as np In [3]: a = np.array([[1, 1], [2, 3], [1, 1], [5, 4], [2, 3]]) In [4]: DataFrame(a).drop_duplicates().values Out[4]: array([[1, 1], [2, 3], [5, 4]], dtype=int64)