Stacking arrays...

Christopher Barker Chris.Barker at noaa.gov
Tue Nov 7 12:56:56 CST 2006


HI all,

I'm trying to get the hang of this new r_ and c_ stuff.

I need to take two MxN arrays, and stack them together into one MxNx2 
arrays. I found this works:

 >>> a = N.ones((3,4))
 >>> b = N.ones((3,4)) * 2
 >>> a
array([[ 1.,  1.,  1.,  1.],
        [ 1.,  1.,  1.,  1.],
        [ 1.,  1.,  1.,  1.]])
 >>> b
array([[ 2.,  2.,  2.,  2.],
        [ 2.,  2.,  2.,  2.],
        [ 2.,  2.,  2.,  2.]])
 >>> a.shape = (3,4,1)
 >>> b.shape = (3,4,1)
 >>> c = N.c_[a,b]
 >>> c.shape
(3, 4, 2)
 >>> c[0,0]
array([ 1.,  2.])


What I'm wondering is if there is a way to do that without explicitly 
adding the extra dimension to a and b before calling c_ ?

-Chris


-- 
Christopher Barker, Ph.D.
Oceanographer
                                     		
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Chris.Barker at noaa.gov

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