[SciPy-user] Matlab to numpy
Nils Wagner
nwagner at iam.uni-stuttgart.de
Thu Jun 22 11:05:57 EDT 2006
David Douard wrote:
> On Thu, Jun 22, 2006 at 03:49:16PM +0200, Nils Wagner wrote:
>
>> David Douard wrote:
>>
>>> On Thu, Jun 22, 2006 at 01:59:45PM +0200, Nils Wagner wrote:
>>>
>>>
> [snip]
>
>>>
>>>
>> Thank you very much.
>> And what is equivalent to a so-called economy size decomposition ?
>>
>> [Q,R] = qr(A,0)
>>
>
> look at the qr function of scipy.linalg, eg.
>
> import scipy
> help(scipy.linalg.qr)
>
> (see $PYTHONPATH/scipy/linalg/decomp.py for more details)
>
> David
>
>
>
The economy size decomposition means that if A is an m \ŧimes n matrix
with m > n then only the first n columns of Q are computed.
linalg.qr computes a full QR decomposition.
Nils
>> Nils
>>
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