On 12/26/06, Alan Gauld <[EMAIL PROTECTED]> wrote:
>
> "linda.s" <[EMAIL PROTECTED]> wrote
>
> 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.]])
>
> OK, This s
"linda.s" <[EMAIL PROTECTED]> wrote
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.]])
OK, This sets up your test array.
a[1:3,:-1:2] # a[i,j] f
Oops, another one where I replied off-list.
-- Forwarded message --
From: Luke Paireepinart <[EMAIL PROTECTED]>
Date: Dec 26, 2006 12:46 AM
Subject: Re: [Tutor] about array
To: "linda. s" <[EMAIL PROTECTED]>
On 12/26/06, linda.s <[EMAIL PROTECTED]&
When I read the following code, I found it was very hard for me to
understand the meaning of a[1:3,:-1:2] for a[i,j] for i=1,2 and
j=0,2,4; the same as a[::3,2:-1:2]
>>> 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
