On 29/04/2008, Gael Varoquaux <[EMAIL PROTECTED]> wrote: > On Tue, Apr 29, 2008 at 11:03:58PM +0200, Anne Archibald wrote: > > I am puzzled by this. What is the rationale for x[i,:] not being a 1-d > > object? > > It breaks A*B[i, :] where A and B are matrices.
Really? How? In [26]: A = np.matrix([[1,0],[0,1],[1,1]]) In [28]: A*np.ones(2) Out[28]: matrix([[ 1., 1., 2.]]) In [29]: np.ones(3)*A Out[29]: matrix([[ 2., 2.]]) I guess you don't get dot products with *: In [30]: np.ones(3).T*np.ones(3) Out[30]: array([ 1., 1., 1.]) Since the whole point of matrices it to avoid having to type "dot" I guess this should be convincing. Anne _______________________________________________ Numpy-discussion mailing list [email protected] http://projects.scipy.org/mailman/listinfo/numpy-discussion
