[SciPy-dev] MCMC, Kalman Filtering, AI for SciPy?
oliphant at ee.byu.edu
Thu Sep 30 15:27:22 CDT 2004
Fernando Perez wrote:
> eric jones schrieb:
>> Of course, we should get some testing feedback on the main platforms
>> with the current CVS before doing this. Besides that, does anyone
>> have any specific (small) things to address before we do so? If so,
>> what is the timeframe?
> I have 2 things:
> 1. I'd like to have the implementation of Frobenius norms fixed. The
> current code, in scipy/linalg/basic.py does this:
> elif ord in ['fro','f']:
> X = scipy_base.mat(x)
> return sqrt(sum(diag(X.H * X)))
> 2. The matrixmultiply != bug I recently reported is _very_ serious for
> people working with large matrices. I also reported it in the numpy
> list, but nobody replied. Since scipy can trivially work around it
> with the one-liner I showed, I think this really should be done.
I think you will see that I released a new version of Numeric that fixed
this problem. See 23.5
> Code for #1 is here (but test it further), and I posted the one-liner
> for #2 yesterday, so these two (IMHO important) fixes should take no
> time for a committer.
We could also fix it in SciPy too.
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