Numpy transpose of 1D array not giving expected result

Question

I am trying a very basic example in Python scipy module for transpose() method but it\'s not giving expected result. I am using Ipython with pylab mode.

Answer 1

Transpose is a noop for one-dimensional arrays.

Add new axis and transpose:

>>> a[None].T
array([[1],
       [2],
       [3]])
>>> np.newaxis is None
True

Or reshape:

>>> a.reshape(a.shape+(1,))
array([[1],
       [2],
       [3]])

Or as @Sven Marnach suggested in comments, add new axis at the end:

>>> a[:,None]
array([[1],
       [2],
       [3]])