[SciPy-dev] Re: [SciPy-user] Low-level code integrationdiscussion at scipy'03?
fperez at colorado.edu
Wed Sep 3 13:09:50 CDT 2003
Perry Greenfield wrote:
>> FP> This, we agree 100% on. In fact, if the C API offered a way
>> FP> to index high rank arrays without manually computing stride
>> FP> offsets on every access, that would probably satisfy a
>> FP> significant fraction of usage cases. I consider one-liners
>> FP> like the above icing on the cake, but A(i,j,k) indexing is
>> FP> really a significant change which makes development far more
>> FP> productive.
> Are you just talking about C macros to do the indexing (including strides?
Well, anything which allows me to say in C/C++:
A(i,j,k,l,m,n) = some_function_of(i,j,k,l,m,n);
square brackets would also work, though
starts to feel ugly real quick.
There seems to be some consensus that in most cases, simplified indexing is
the #1 wish. Everything else (array arithmetic, math functions over arrays,
etc) would be nice, but not a first requirement.
I'd also add that slicing is pretty high on my list, or some mechanism to say
'this part of this array is really a subset of that one' without data copying.
Blitz supports this with semantics and syntax which are eerily similar to
those in Numeric/Numarray at the python level.
More information about the Scipy-dev