rearrange the array elements using numpy in python

Question

How to get new array (NEW) from old array (OLD)?

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 (???

mgilson · Accepted Answer · 2013-11-09 05:32:31Z

3

Do you mean like this?

>>> 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]])

answered Nov 9, 2013 at 5:32

mgilson

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2 Comments

2964502 Over a year ago

yes,thanks. can you instruct me the meaning of: order='F'? @mgilson

Back2Basics Over a year ago

There is a difference between the "C" based ordering and the "F"ortran based ordering. Plug in order='C' for the difference.

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