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
