On 01/27/2012 02:52 PM, Chao YUE wrote: > Dear all, > > suppose I have a ndarray a: > > In [66]: a > Out[66]: array([0, 1, 2, 3, 4]) > > how can use it as 5X1 array without doing a=a.reshape(5,1)? a[:, np.newaxis] a[:, None] np.newaxis is None Dag