On 21.01.2005, at 02:29, Yun Mao wrote:
1. When I do v = u[:, :], it seems u and v still point to the same memory. e.g. When I do v[1,1]=0, u[1,1] will be zero out as well. What's the right way to duplicate an array? Now I have to do v = dot(u, identity(N)), which is kind of silly.
There are several ways to make a copy of an array. My personal preference is import copy v = copy(u) because this is a general mechanism that works for all Python objects.
2. Is there a way to do Matlab style slicing? e.g. if I have i = array([0, 2]) x = array([1.1, 2.2, 3.3, 4.4]) I wish y = x(i) would give me [1.1, 3.3] Now I'm using map, but it gets a little annoying when there are two dimensions. Any ideas?
y = Numeric.take(x, i) Konrad. -- ------------------------------------------------------------------------ ------- Konrad Hinsen Laboratoire Leon Brillouin, CEA Saclay, 91191 Gif-sur-Yvette Cedex, France Tel.: +33-1 69 08 79 25 Fax: +33-1 69 08 82 61 E-Mail: hinsen@llb.saclay.cea.fr ------------------------------------------------------------------------ -------