Zak Stone wrote:
> Hi everyone,
>
> I'm just getting started with Cython, and I'm wondering whether fast
> matrix and vector operations are currently supported. The two threads
> linked below ("access to numpy functions?" and "numpy calls without
> Python overhead?") suggest that such operations cannot be accelerated,
> but I'm curious whether that has changed.
>
> I work in computer vision with algorithms that frequently require
> matrix multiplications, vector norm computations, manipulation of
> individual rows of a matrix of feature vectors, and so forth. It would
> be tremendously useful to be able to combine fast loops with these
> operations! If Cython isn't going in this direction, could you kindly
> suggest how I could interact with the relevant BLAS routines correctly
> and efficiently from C?
>
We might be going in that direction, but we won't be there before in a
year or two at least (depending on interest/available developer time).
BLAS has a seperate API for calling from C. An example for calling a
BLAS function is given in
http://sage.math.washington.edu/home/dagss/numerical-cython-preprint.pdf.
The rest one should be able to figure out by reading the CBLAS API.
Dag Sverre
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