[SciPy-User] Problem with passing a 2D Numpy array in the C code by weave.inline

Dag Sverre Seljebotn dagss@student.matnat.uio...
Thu Dec 3 08:31:35 CST 2009


Steven Nien wrote:
> Hi,
> Thanks.
> I use the following code, and it works.
>
> inline(code,['arr'], verbose = 1, compiler = 'gcc',  type_converters = 
> converters.blitz)
>
> But it  works in the arr(i,j) syntax.
>
> Is there any way to use the original C syntax ( arr[i][j] ) ?
arr[i][j] fundamentally access something else than a NumPy array. NumPy 
arrays are blocks of memory indexed by indexes and strides, while 
arr[i][j] refer to a double-pointer-indirection style array. I.e. they 
are simply not the same thing, and the answer is no.

I'd use a regex search&replace. Alternatively, you can get what you want 
with a custom written C++ class (with an operator overload which defines 
[] in the way you need it).

Dag Sverre


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