newbie doubt ..numpy array

if this is too silly a qn pls forgive
I was learning numpy.ndarrays thru the tutorial.

myarr=numpy.array( [ [10, 20, 30, 40],[1,2,3,4],[5,6,7,8] ] )
if i want to access the element 3 i can do it by myarr[1, 2]

but then myarr[1][2] will also give the same result..is there any
reason why two types of indexing is allowed?
gordon

p.s(i tried to post to numpy grp but it is not appearing there!)

nodrogbrown

On Sun, 20 Jan 2008 22:07:31 -0800 (PST), nodrogbrown
<> declaimed the following in comp.lang.python:


> myarr=numpy.array( [ [10, 20, 30, 40],[1,2,3,4],[5,6,7,8] ] )
> if i want to access the element 3 i can do it by myarr[1, 2]
>
> but then myarr[1][2] will also give the same result..is there any
> reason why two types of indexing is allowed?
> gordon
>
The first is likely a numpy extension (and corresponds to the syntax
many of the classical number crunching languages support: FORTRAN,
Ada...). The second is Python's native syntax (and corresponds to less
focused languages -- such as C; in which a matrix [2D array] is an array
of arrays). You first retrieve the sublist accessed by [1], and then
access the element addressed by [2]
--
Wulfraed Dennis Lee Bieber KD6MOG

HTTP://wlfraed.home.netcom.com/
(Bestiaria Support Staff: web-)
HTTP://www.bestiaria.com/

Dennis Lee Bieber