python - 在python中使用numpy重新排列数组元素

Question

如何从旧数组（OLD）中获取新数组（NEW）？

import numpy as np
OLD=np.array([1,4,7,2,5,8,3,6,9])

NEW = [[1,2,3],[4,5,6],[7,8,9]]

NEW = OLD.reshape (???

Answer 1

你的意思是这样吗？

>>> import numpy as np
>>> OLD = np.array([1,4,7,2,5,8,3,6,9])
>>> OLD.reshape((3, 3), order='F')
array([[1, 2, 3],
       [4, 5, 6],
       [7, 8, 9]])