Hi Ralf, I am happy to edit it, although I will have to do it later as I won't have much free time recently.
I have registered as haoxiong on docs.scipy.org and would like to request edit rights to the pinv page. Thanks, Hao On 03/09/11 04:16, Ralf Gommers wrote: > Hi Hao, > > On Wed, Mar 9, 2011 at 9:01 AM, Hao Xiong <h...@biostat.ucsf.edu> wrote: >> I think the documentation for np.linalg.pinv contains some inaccuracies. > Thanks for your comments. Are you interested to make some improvements > yourself? It's quite easy to do on the numpy doc wiki: > http://docs.scipy.org/numpy/docs/numpy.linalg.linalg.pinv/ > Just ask for edit rights on this list after registering a username. > > Cheers, > Ralf > > >> Most importantly, Moore-Penrose is not defined by the solution to the >> least-square >> problem. It was defined by the unique solution to 4 equations. Since SVD >> can be easily shown to satisfy the same 4 equations, it is the >> Moore-Penrose inverse. >> >> Another way that definition is wrong is that the least-square problem >> does not have to have >> unique solution. In fact, it can have infinitely many. In this case, >> Moore-Penrose is the minimum >> norm solution. >> >> All of this is discussed in the Matlab documentation of pinv, which is >> very good. >> >> >> Hao >> _______________________________________________ >> NumPy-Discussion mailing list >> NumPy-Discussion@scipy.org >> http://mail.scipy.org/mailman/listinfo/numpy-discussion >> > _______________________________________________ > NumPy-Discussion mailing list > NumPy-Discussion@scipy.org > http://mail.scipy.org/mailman/listinfo/numpy-discussion _______________________________________________ NumPy-Discussion mailing list NumPy-Discussion@scipy.org http://mail.scipy.org/mailman/listinfo/numpy-discussion
