[SciPy-user] Slicing arrays

Fabrice Silva silva@lma.cnrs-mrs...
Mon Dec 10 16:07:59 CST 2007

```>>> a=arange(66)
>>> a
array([ 0,  1,  2,  3,  4,  5,  6,  7,  8,  9, 10, 11, 12, 13, 14, 15, 16,
17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33,
34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50,
51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65])
>>> tmp = a.reshape(6,11)
>>> tmp
array([[ 0,  1,  2,  3,  4,  5,  6,  7,  8,  9, 10],
[11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21],
[22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32],
[33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43],
[44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54],
[55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65]])
>>> b=tmp[:,0:3]
>>> b
array([[ 0,  1,  2],
[ 6,  7,  8],
[12, 13, 14],
[18, 19, 20],
[24, 25, 26],
[30, 31, 32],
[36, 37, 38],
[42, 43, 44],
[48, 49, 50],
[54, 55, 56],
[60, 61, 62]])
>>> b.ravel()
array([ 0,  1,  2,  6,  7,  8, 12, 13, 14, 18, 19, 20, 24, 25, 26, 30, 31,
32, 36, 37, 38, 42, 43, 44, 48, 49, 50, 54, 55, 56, 60, 61, 62])

--
Fabrice Silva <silva@lma.cnrs-mrs.fr>
LMA UPR CNRS 7051 - équipe S2M

```