[Numpy-discussion] doing zillions of 3x3 determinants fast

Charles R Harris charlesr.harris@gmail....
Mon Aug 25 00:49:45 CDT 2008


On Sun, Aug 24, 2008 at 9:48 PM, Daniel Lenski <dlenski@gmail.com> wrote:

> Hi all,
> I need to take the determinants of a large number of 3x3 matrices, in
> order to determine for each of N points, in which of M tetrahedral cells
> they lie.  I arrange the matrices in an ndarray of shape (N,M,5,3,3).
>

If you step back a bit and describe the actual problem you have, rather than
your current solution, it might be that there are algorithms in scipy to
solve it.

Chuck
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