[Numpy-discussion] Remove duplicate columns
T J
tjhnson at gmail.com
Thu May 6 13:25:38 EDT 2010
Hi,
Is there a way to sort the columns in an array? I need to sort it so
that I can easily go through and keep only the unique columns.
ndarray.sort(axis=1) doesn't do what I want as it destroys the
relative ordering between the various columns. For example, I would
like:
[[2,1,3],
[3,5,1],
[0,3,1]]
to go to:
[[1,2,3],
[5,3,1],
[3,0,1]]
(swap the first and second columns). So I want to treat the columns
as objects and sort them. I can do this if I convert to a python
list, but I was hoping to avoid doing that because I ultimately need
to do element-wise bitwise operations.
Thanks!
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