使用data[np.argsort(data[:, 0])]，其中0是要排序的列索引：
In [27]: import numpy as np
In [28]: data = np.array([[5,2], [4,1], [3,6]])
In [29]: col = 0
In [30]: data=data[np.argsort(data[:,col])]
Out[30]:
array([[3, 6],
[4, 1],
[5, 2]])
按列排序python数组/ recarray
按列排序python数组/ recarray
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