Re: Re-ordering columns or rows of an array efficiently
- From: Dan Nagle <dannagle@xxxxxxxxxxx>
- Date: Wed, 28 Nov 2007 22:01:04 GMT
Hello,
Mike wrote:
A0=A(:,E)
A=A0
Of course, this requires having a matrix the size of A allocated
twice. Since A is several gigabytes on my system, this is a rather
undesirable way to do things. Yet, I get errors if I try something
like A=A(:,E). Can anyone suggest a way of doing this that doesn't
require as much memory?
Have you tried writing a swap_columns routine
to swap the columns using a temporary vector?
Or is E not a permutation?
--
Dan Nagle
Purple Sage Computing Solutions, Inc.
.
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