Hi,
On Sat, Jan 16, 2010 at 9:38 PM, Kakaz <kazimierz.k...@gmail.com> wrote:
> I would like to ask: how to create in Sage table of numbers with
> three indexes, something like C[i,j,k]?
Sage is based on Python, so creating multidimensional tables in Sage
is similar to how you would do it in Python. You can do it using lists
of lists:
sage: A = [1..5]
sage: B = [i**2 for i in A]
sage: C = [i**3 for i in A]
sage: L1 = [A, B, C]
sage: L2 = [B, C, A]
sage: L3 = [C, A, B]
sage: T = [L1, L2, L3]
sage: T[0]
[[1, 2, 3, 4, 5], [1, 4, 9, 16, 25], [1, 8, 27, 64, 125]]
sage: T[0][0]
[1, 2, 3, 4, 5]
sage: T[0][0][0]
1
Or you can use NumPy:
sage: import numpy
sage: T = numpy.array([L1, L2, L3])
sage: T[0]
array([[ 1, 2, 3, 4, 5],
[ 1, 4, 9, 16, 25],
[ 1, 8, 27, 64, 125]])
sage: T[0, 0]
array([1, 2, 3, 4, 5])
sage: T[0, 0, 0]
1
--
Regards
Minh Van Nguyen
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