[Numpy-discussion] np.unique for one bi-dimensional array

[Giuseppe Amatulli]

Hi,

would like to identify unique pairs of numbers in two arrays o in one
bi-dimensional array, and count the observation

a_clean=array([4,4,5,4,4,4])
b_clean=array([3,5,4,4,3,4])

and obtain
(4,3,2)
(4,5,1)
(5,4,1)
(4,4,2)

I solved with tow loops but off course there will be a fast solution
Any idea?
what about using np.unique for one bi-dimensional array?

In bash I usually unique command

thanks in advance
Giuseppe

-- 
Giuseppe Amatulli
Web: www.spatial-ecology.net