Broadcasting
を期待されています!
def split_digits(a):
N = int(np.log10(np.max(a))+1) # No. of digits
r = 10**np.arange(N,-1,-1) # 10-powered range array
return (np.asarray(a)[:,None]%r[:-1])//r[1:]
サンプルの実行 -
In [224]: a = range(0,1001)
In [225]: split_digits(a)
Out[225]:
array([[0, 0, 0, 0],
[0, 0, 0, 1],
[0, 0, 0, 2],
...,
[0, 9, 9, 8],
[0, 9, 9, 9],
[1, 0, 0, 0]])
In [229]: a = np.random.randint(0,1000000,(7))
In [230]: a
Out[230]: array([431921, 871855, 636144, 541186, 410562, 89356, 476258])
In [231]: split_digits(a)
Out[231]:
array([[4, 3, 1, 9, 2, 1],
[8, 7, 1, 8, 5, 5],
[6, 3, 6, 1, 4, 4],
[5, 4, 1, 1, 8, 6],
[4, 1, 0, 5, 6, 2],
[0, 8, 9, 3, 5, 6],
[4, 7, 6, 2, 5, 8]])
もう一度おねがいします!これは美しいです。 – akilat90