newbie doubt ..numpy array

[nodrogbrown]

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!)

 

[Dennis Lee Bieber]

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
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