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best way to take vertical slices from a matrix?

Duncan Boothduncan at NOSPAMrcp.co.uk
Thu Apr 26 05:08:27 EDT 2001


delgado at okeeffe-pc3.la.asu.edu (Olaf Delgado Friedrichs) wrote in <slrn9ecvsj.he1.delgado at okeeffe-pc3.la.asu.edu>:> If your rows can be tuples, you need something like>>>>> def vslice(a,j):> ...   return apply(map, [None] + map(tuple, a))[j]> ...>Surely a single map is sufficient to do everything the original question asked?>>> print x[(1, 2, 3), (4, 5, 6), (7, 8, 9)]>>> apply(map, (None,) + tuple(x))[(1, 4, 7), (2, 5, 8), (3, 6, 9)]>>>-- Duncan Boothduncan at rcp.co.ukint month(char *p){return(124864/((p[0]+p[1]-p[2]&0x1f)+1)%12)["\5\x8\3""\6\7\xb\1\x9\xa\2\0\4"];} // Who said my code was obscure?


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