Here is a kluge that is closer to what I want. Can be copied into and run
in a Sage cell. The deficiency in the construction is on lines 6-8 (within
commented section).
class PoolingMatrix(sage.matrix.matrix_integer_dense.Matrix_integer_dense):
# Example construction:
# a = matrix(ZZ, [[1,1],[2,2]])
# m=PoolingMatrix(parent(a), [1,2,3,4], False, False)
#
# But the construction above is silly. You have to make a matrix of
same dimensions and get its parent before
# constructing the matrix you want.
# I would prefer these construction capabilities:
# m = PoolingMatrix(ZZ, [[1,0,0],[0,1,0]])
# m = PoolingMatrix(ZZ, 2, [1,0,0,0,1,0])
# m = PoolingMatrix(ZZ, 2, 3, [1,0,0,0,1,0])
# And since the ring is always ZZ, maybe the ZZ argument should be
optional.
def __init__(self, parent, data, arg1, arg2):
print data
sage.matrix.matrix_integer_dense.Matrix_integer_dense.__init__(self,
parent, data, arg1, arg2)
self.d_lower_bound = -1
# parent class, maybe dense integer matrices, provides the method
ncols()
self.d_upper_bound = self.ncols()
a = matrix(ZZ, [[1,1],[2,2]])
m=PoolingMatrix(parent(a), [1,2,3,4], False, False)
print m.ncols()
On Wednesday, June 5, 2013 10:09:55 AM UTC-7, Rob wrote:
>
> Thanks for the responses. Probably the answer is I don't know what
> __init__ method to call within the inheriting __init__ method.
>
> Maybe I'd like to say:
>
> class PoolingMatrix(parent_class):
> def __init__(self, ring_arg, 2D_list_arg):
> parent_class.__init__(self, ring_arg, 2D_list_arg)
> self.my_variable1 = ...
> self.my_variable2 = ...
>
> I'm getting confused by what's a class, what's a constructor, what's a
> parent going into a Matrix_integer_dense.__init__ call, etc. (this is for
> example, not saying Matrix_integer_dense is right). I do know that I want
> dense integer matrices of whatever shape the the 2D_list_arg determines.
>
> I'd like to know what to put in for parent_class in both places above, and
> whether the same thing goes in both places.
>
> Thanks,
> Rob
>
>
>
> On Wednesday, June 5, 2013 9:37:01 AM UTC-7, David Roe wrote:
>>
>> Are you calling some_matrix_thingy.__init__ inside your __init__ method?
>> David
>>
>>
>> On Tue, Jun 4, 2013 at 8:10 PM, Rob <ulam...@gmail.com> wrote:
>>
>>> I am trying to make a class PoolingMatrix, which needs to be an
>>> (binary) integer matrix with extra attributes and functions. For
>>> example, I'd like to say:
>>>
>>> sage: m = PoolingMatrix(ZZ, [[1,0,0],[0,1,0],[0,0,1]])
>>> sage: m.nrows()
>>> 2
>>> sage: m.is_disjunct(2) # the 3x3 identity matrix is 2-disjunct
>>> True
>>>
>>> But the init specification for PoolingMatrix is tripping me up. Can
>>> anyone provide a suggestion?
>>>
>>> I'm trying something like:
>>> class PoolingMatrix(some_matrix_thingy):
>>> def __init__(self, input_ring, input_array):
>>> ...
>>>
>>> Thanks for any assistance
>>> -Rob
>>>
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>>>
>>
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