Nils Wagner wrote: > David Cournapeau wrote: >> Hi, >> >> I was wondering what an empty matrix is, and what it is useful for >> (by empty matrix, I mean something created by numpy.matrix([])) ? Using >> those crash some functions (see for example scipy ticket #381), and I am >> not sure how to fix this bug. >> >> David >> _______________________________________________ >> Numpy-discussion mailing list >> Numpy-discussion@scipy.org >> http://projects.scipy.org/mailman/listinfo/numpy-discussion >> > empty(...) > empty((d1,...,dn),dtype=float,order='C') > > Return a new array of shape (d1,...,dn) and given type with all its > entries uninitialized. This can be faster than zeros. > I understand numpy.empty, but this is different: an empty matrix is not equivalent at all to empty. What I am talking about is what is the nature of something lie numpy.array((1, 0)) ? I am actually wondering whether it makes sense at all.
a = numpy.matrix([]) b = a + 1 does not raise any error, but I don't see how this should be considered meaningful ? David _______________________________________________ Numpy-discussion mailing list Numpy-discussion@scipy.org http://projects.scipy.org/mailman/listinfo/numpy-discussion
